Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (2023)

Many gardeners rely on Miracle-Gro fertilizer to get the best results from their hard work in the garden. After hours of back-breaking labor double-digging garden beds and carefully nursing seedlings until just the right moment, you want to know your gardening efforts will pay off with blooms and vegetables.

An overwhelming selection of fertilizers and supplemental nutrients for your garden and landscaping litters the market. It’s nearly impossible to decide which one is right for your plants and your soil quality. Miracle-Gro fertilizer is one of the biggest names in gardening products. As a division of Scott, it may probably be the best-known and most-purchased brand on the market. But can it live up to the hype? Or is its popularity the result of relentless marketing?

Miracle-Gro offers a wide range of different products for both landscaping and house plants. Along with their famous green all-purpose formula, we’ll take a look at their specialty products as well. We’ll be comparing the various formulas, analyzing the ratios, and looking at both professional and consumer reviews. We’ll also size up the competition and see if other brands might offer the same – or even better – quality for your buck.

The Scotts Miracle-Gro Reputation

Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (1)

Miracle-Gro’s launched its original formula in the 1940s; the result of the work of Horace Hagedorn and Otto Stern. Hagedorn designed the packaging and logo, which remains in use today. Scotts, incorporated in 1868, merged with Miracle-Gro in 1995.

Both companies have an established reputation, resulting in many decades of research and industry experience. They have been the object of some controversy, however, as the distributor for Roundup, an herbicide. They were also fined $4.5 million for selling bird seed covered with pesticides. Both civil and criminal penalties resulted, as the company falsified information that the Environmental Protection Agency (EPA) requires.

As frequently outspoken advocates for the environment, many gardeners may choose not to do business with Scotts Miracle-Gro for these reasons. And we’d be remiss if we didn’t mention these issues.

Understanding Fertilizer

Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (2)

(Video) Top 6 Worst and 6 Best Garden Fertilizers

Controversies aside, let’s take a quick look at what fertilizer is, how it works, and how the various types differentiate themselves.Fertilizers add necessary nutrients that plants need to grow and flourish. They fall broadly into either organic or chemical fertilizers.

Organic fertilizers often comprise natural ingredients that provide nutrients. These can range from composted manure or marine emulsions. You can easily compare organic vs. chemical fertilizers by imagining that it’s the difference between eating an orange and taking a Vitamin C tablet. The orange contains micronutrients and fiber without providing too much of any one nutrient. Using organic fertilizer also reduces the environmental impact of excess nutrients. Many gardeners say that organic fertilizers impart a much better flavor to their vegetables and fruits because they grow and ripen more slowly and naturally.

But there are downsides to organic fertilizer, too. They can be more costly to make and to purchase. They also require more effort to use. Composted manure, for example, comes in heavy bags. Then you need to work it into the soil through arduous digging. If you use fish emulsion, you must mix it right before using it. And it smells as bad as the name implies. Many gardeners with large plots or physical limitations find maintaining their garden with organic fertilizer alone impossible.

Another downside is that many plants require different nutrients during their growth cycle. This leaves the gardener regularly on the hunt for something with the right nutrients depending on whether their plants are sprouting, flowering, or fruiting. It’s easy to find yourself the perplexed owner of 40 different types of organic fertilizers.

Chemical fertilizer

Chemical fertilizers allow you to add a more concentrated dose of the necessary nutrients. The benefits provided with chemical fertilizers are lower cost and higher convenience. Many chemical formulas, like Miracle-Gro fertilizer, come in a concentrated form that’s easy to mix and store for use at any time. These concentrated formulas are not just cheaper; they’re easier and lighter to handle.

Another benefit is that chemical formulas like Miracle-Gro combine nutrients in specific ratios for various plants and specific phases of growth. For example, some plants require acidic soil. Using a chemical fertilizer allows the gardener to manage soil pH while feeding. When plants become ready to bloom, they need more phosphorus. Chemical fertilizers come in high-phosphorous formulas specifically for blooming season.

Understanding Fertilizer Ratios

Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (3)

Because Miracle-Gro is a chemical fertilizer, and we’re reviewing their range of products, we’ll be comparing it to other chemical fertilizers. One important tool you’ll need to compare and purchase the best products for your garden is a basic understanding of fertilizer ratios and how they impact your flowers and vegetables.

NPK fertilizers

You’ll find that most commercial plant foods, like Miracle-Gro fertilizer, are “NPK Fertilizers.” Most chemical fertilizers combine three separate nutrients in a variety of balances: nitrogen, phosphorus, and potassium. When you’re browsing the garden aisles of your favorite store, you’ll see these nutrients as a combination of three numbers. For example, 10-10-10, or 15-5-10. The numbers follow the order listed above: nitrogen – phosphate – potassium.


Nitrogen supplies the energy necessary for leaf growth. Particularly crucial for green houseplants and landscaping bushes, a high nitrogen number means more available nutrients for growing lush foliage

(Video) Why I Don't Use Miracle Grow


Fertilizers high in phosphorus promote the development of healthy roots. It also boosts the growth of flowers and fruits.


Potassium promotes the growth of the stems, providing a strongcirculatory system for water throughout the plant. It also supports the growth of flowers and fruits.

Miracle-Gro Fertilizer Products

Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (4)

One positive for Miracle-Gro fertilizer products is the convenience. Overall, you’ll find water soluble concentrate formulas, “Shake and Feed” formulas, plant spikes, even single-serve packs. Their all-in-one garden feeder may be one of the most popular and convenient products on the market. Simply attach a hose to the pre-filled garden sprayer and soak your plants in their all-purpose formula. So, whether you have expansive flower beds to feed or a single houseplant on your office desk, they’ve certainly covered the convenience factor.

Specific Miracle-Gro Fertilizer Formulas

Miracle-Gro Fertilizer Gardening Review: Does It Live up to the Hype? (5)

Another positive for Miracle-Gro fertilizer is the variety of formulas they offer. If you can grow it, Miracle-Gro has food for it. Whether you nurture rare orchids or grow pineapples, they make a fertilizer formulated just for your plant:

  • All-purpose fertilizer
  • Citrus, avocado, and mango Food
  • Tomato plant food
  • Flowering trees and shrubs plant food
  • Palm tree food
  • Rose plant food
  • Bloom Booster® flower food
  • Acid-loving plant food
  • Lawn food
  • Azalea, camellia, rhododendron plant food
  • Orchid food
  • Succulent plant food

Below, we’ll look at the makeup of some of their most popular products.

(Video) Organic Fertilizers - My Top 5 Choices For 2021!

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Miracle-Gro’s flagship product is their simple granular formula you mix with water and feed every week or two. It truly is all-purpose, and you can use it for houseplants, flower beds, or garden vegetables. With an NPK ratio of 24-8-16, it’s most suitable, however, for houseplants and landscape foliage. Some gardeners might find it a bit heavy on nitrogen for the best blooms or vegetables. And because of its high nitrogen count, you should take care when using it in outdoor applications to avoid runoff into natural waterways.


  • Cheap
  • Easy to use
  • Can be used on all plants, indoors or outdoors
  • Ninety-one percent of users gave it positive reviews


  • High nitrogen levels require extra care to avoid burning
  • Needs to be applied weekly for best results
  • Organic experts warn that the source of nitrogen may harm soil microorganisms

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Miracle-Gro boasts that their tomato food is great for any garden veggies. With an NPK ratio of 18-18-21, that’s likely very true. It’s a well-balanced mix that’s rich in nutrients that feed the leaves, stems, and fruits. The product also includes iron, magnesium, copper, manganese, and zinc.


  • The blend of nutrients seems well-suited for troublesome tomatoes
  • Very well priced product
  • Ninety-five percent of users gave it positive reviews
  • Can also be used on other vegetables, like cucumbers and peppers


  • May cause leaf burn if improperly used
  • Requires weekly feeding, which many find time-consuming
  • Doesn’t contain calcium, which helps prevent blossom end rot
  • Forced rapid growth can negatively affect tomato flavor

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Miracle-Gro claims their rose food is good for other flowering plants, and they provide a formula of 18-24-16 for healthy roses. This ratio provides plenty of nutrients for use throughout the entire growing season. And consumers say the rose formula performs better on roses than the Miracle-Grow Bloom Booster.


  • Very affordable
  • Boasts an endorsement from the American Rose Society
  • You can feed every other week instead of every week
  • Ninety-six percent of buyers gave the Miracle-Gro fertilizer a positive review


  • None identified

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Slightly higher in phosphorus than their rose food formula, Miracle-Gro’s Bloom Booster provides an NPK of 15-30-15. Use throughout the growing season on annuals and after the initial spring regrowth for perennials. Reviews are more than enthusiastic about the quality of this particular blend from Miracle-Gro.


  • Feed every other week
  • Works for annuals and perennials
  • Also works well on blooming vegetables and fruit plants


  • More expensive than the rose food formula
  • Less product in the box than other Miracle-Gro fertilizer formulas.
  • Requires more product per dosage, which means you’ll use it up quickly.

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Plants that require acidic soil to flower are common in the South and include azaleas and, hibiscus. Northern plants that love acid are hydrangeas and camellias. Keep the soil balanced for colorful blooms while you fertilize with this 30-10-10 formula. This one is high in nitrogen, so be careful to use only as and where needed.


  • Safe for use around non-acid-loving plants
  • Also good for acid-loving fruit bushes like blueberries and pineapples
  • Ninety-three percent positive reviews from users
  • It contains micronutrients such as boron, copper, iron, manganese, molybdenum, and zinc.


  • Can burn if improperly applied
  • May not be reliable for changing the color of hydrangeas

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Blending organic fertilizers with chemical nutrients, Miracle-Gro’s fertilizer for flowering trees and bushes provides an NPK ratio of 18-6-12. This means you will want to use it in the early spring when leaf growth is fastest and once in the middle of the growing season. The instructions recommend not applying too late in the growing season. Their all-purpose mix might be just as useful; however, this product is a slow-release formula that works for three months, making it somewhat more convenient to apply.


  • No mixing required – apply around trees and bushes in early spring
  • Excellent for fruit trees as well
  • Positive reviews were 95 percent
  • Contains organic fertilizers, such as bone meal, kelp, and earthworm castings


  • More expensive than mix and feed formulas
  • Maybe too low in boost flower growth, requiring the use of a bloom booster for decorative bushes

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For outdoor use in sub-tropical and hot climates, Miracle-Gro fertilizer for palms provides a slow release formula. With an NPK of 8-4-8, it also includes micronutrients such as magnesium, iron, and manganese to prevent fronds from yellowing.


  • Useful Miracle-Gro fertilizer for indoor potted palms
  • Slow release product you only feed every three months


  • Hard to find unless you live in a region that supports palm tree grow
  • You’ll need to mix it into the first couple inches of soil
  • Doesn’t contain boron, a necessary nutrient for palm trees

Competition for Miracle-Gro Fertilizer

Two of the strongest competitors for the lines of Miracle-Gro fertilizer are Schultz and JP Peters. Both offer a range of easy-to-use, water-soluble plant foods that provide targeted nutrient profiles for specific plants and flowers.

(Video) Miracle Grow vs Fox Farm Happy Frog Potting Soil Honest Review // Check Result

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Schultz fertilizer enjoys a good reputation in the gardening community. With similar formulations as those provided by Miracle-Gro fertilizer, the company competes directly. The product packaging even looks similar, although Schultz uses different NPK ratios for their various formulas.

Schultz, however, offers a few products that differ from Miracle-Gro. For example, their all-purpose plant food formula comes in two different formula. The first is a 10-15-10 concentrate that only requires seven drops per quart of water. This makes it ideal for feeding houseplants or outdoor container gardens. Another product is their super-charged 20-20-20 concentrate that offers affordability. A 5-pound box contains a larger number of feedings when used as instructed.

Schultz’s Bloom Plus formula provides an NPK of 10-54-10 which focuses on phosphorus for quick blooms. Although not the big seller like Miracle-Gro fertilizer, Schultz can boast a 100 percent positive rating on this product.

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Overall, Schultz products are less expensive, and a better value. This is partly because the Schultz product instructions tell you to use a smaller amount of product added to the water before feeding to get the same or similar results as the Miracle-Grow products. This combined with the already lower price means more value for the money.

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Similar to Miracle-Gro and Schultz, JR Peters offers a wide range of water-soluble fertilizers for a variety of plants. Their “Jack’s Classic” line offers plant food for home gardening. Their all-purpose mix has a 20-20-20 NPK ratio and enjoys good reviews, despite being more expensive than the other two brands with no other discernable difference.

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They boast that their tomato fertilizer has calcium to prevent end blossom rot, and customers are impressed. Again, the Jack’s Classic brand is considerably more expensive. Similarly, Jack’s Bloom Booster received 94 percent positive reviews, although some users thought the product didn’t live up to the hype. They also didn’t appreciate the price that rings in at easily three times the cost of the other two company’s products.

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Is Miracle-Gro Fertilizer as good as everyone says?

All three of these brands have different NPK ratios, and it takes more than a good fertilizer to ensure fabulous results in the garden. In fact, it just depends. A few of the Miracle-Gro fertilizer products seem to be the hands-down favorite, particularly their rose food. Rose enthusiasts may want to keep the American Rose Society’s endorsement in mind.

As far as their all-purpose formula, Schultz might be a better value for the dollar. With its 20-20-20 NPK ratio, compared to Miracle-Gro’s 24-8-16, it addresses all plant requirements for leaf, flower, and root growth. You’ll also use a lot less for each feeding. This means that any size package you purchase will last much longer.

Whichever brand you decide on, remember to take some cautions when using chemical fertilizers. A weaker mixture means you’re less likely to burn your tender plants. It’s always best to fertilize more often with a weaker solution than to overdo it with a stronger formula once or twice a month. Not only is it safer for your plants, but it also means less nitrogen is entering the water table and affecting the environment.

Many gardeners say organic is best, but it’s also labor intensive and expensive. As long as you don’t overfeed your plants, there isn’t a rule that says you can’t integrate both methods for the best results.

(Video) How I Fertilize Flowers and Vegetables! 🌿🌺💦// Garden Answer

What are your favorite fertilizers or plant food brands? Do you have any tips to share for growing lush plants and beautiful blossoms? If so, please add them to the comments below. That way, all our readers can benefit from your experience.

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Last update on 2022-01-29 at 14:37 / Affiliate links / Images from Amazon Product Advertising API


Is Miracle-Gro environmentally friendly? ›

Miracle-Gro is not an organic fertilizer as it is made with chemicals or syhtnetic ingredients. The short answer: no. Standard Miracle-Gro “all purpose plant food” fertilizers are synthetic and should not be used in organic gardens.

What time of day is best to put Miracle Grow on your garden? ›

Answer: Per the manufacturer, Miracle-Gro Water Soluble All Purpose Plant Food can be applied at anytime. If plants are experiencing drought or really dry soil, then it is suggested to water the plant before applying the product. Light to moderate rain is perfectly fine before or after an application.

When should you stop using Miracle-Gro? ›

If your plants' foliage is growing more than usual that the plants stop looking beautiful, it's the time to stop using more miracle gro. If you notice that the leaves' color is changing than the original color, it is a sign that you are overdosing miracle gro.

What happens if you use Miracle Grow Too often? ›

While fertilizer used in the right quantities can indeed promote houseplant growth, when overdoing it, you hinder the very growth you want. In fact, you're slowly killing your plant, and so its foliage, stems, or roots may be undersized. They'll also look brittle, crinkled, wilted, or limp.

Why do gardeners not like Miracle-Gro? ›

The problem with MG is that the nitrogen is derived from synthetic ammonium and water soluble nitrates, producing off-chemicals that are harmful to soil microbes, worms, and all other forms of life in the soil.

Is Miracle-Gro toxic to humans? ›

This material is not considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200). Contact with eyes may cause irritation.

How often should I water my plants with Miracle Grow? ›

Measure and mix it directly into your watering can and pour the solution around the bases of your plants, or use with your hose in a sprayer (like the Miracle-Gro® Garden Feeder) for larger areas. Plan to feed every 7 to 14 days.

How many times a week should you use Miracle Grow? ›

For best results, feed your plants every 7-14 days.

Should you fertilize plants in hot weather? ›

Don't fertilize plants or trees during hot summer months

During hot spells, it is especially hard to keep up with plant water and nutrient needs as soils dry out quickly and water may not be readily available. Save your plants (and yourself!) from stress by stopping fertilizer application before hot weather hits.

What time of year to use Miracle Grow? ›

Feed every 2 weeks from early spring - late summer.

What time of day is best to fertilize plants? ›

Fertilize outdoor plants in the coolest part of the day, such as early morning or late evening, especially in hot summer weather. Always water in fertilizers well to distribute nutrients throughout the soil profile and to prevent burning.

Is Miracle Grow good for tomatoes? ›

This water soluble fertilizer grows bigger, more bountiful vegetables (compared to unfed plants). It feeds instantly, and is great to use on all types of vegetables, including tomatoes, cucumbers, squash, peppers, and carrots. Use watering can or Miracle-Gro Garden Feeder to apply.

Is Miracle Grow high in nitrogen? ›

Ingredients. Miracle-Gro Water Soluble Plant Fertilizer includes a high concentration of nitrogen, phosphorus and potassium which are three nutrients found in all fertilizers to assist with plant growth and development.

Can plants recover from over fertilizing? ›

The best way to solve the problem of over-fertilization is to leach excess nutrients from the soil by using watering to slowly flush out the pot. (Your pot will need drainage holes for this.) To leach the soil, put your plant in a sink, tub, or outside where it can drain and give it a nice, long watering.

What is an alternative to Miracle Grow? ›

Medina's HastaGro is an organic alternative for all Miracle-Gro products. This plant food promotes larger fruits and blooms without unnatural chemicals and toxins. HastaGro also prevents salt and chemical buildup in the soil, which is crucial for long-term gardening.

Does Miracle Grow work on weeds? ›

Use around listed flowers, vegetables, roses, groundcovers, shrubs and trees. For Best Results: • Apply early in the season. This product prevents weeds from germinating; it does not kill existing weeds.

Does Miracle-Gro have chemicals in it? ›

Miracle-Gro is a synthetic fertilizer that contains ammonium phosphate and several other chemicals that can be toxic to your soil and plants. It is prohibited from use in certified-organic farming.

Does Miracle Grow have pesticides? ›

(Miracle-Gro potting soil, for the record, contains synthetic fertilizer but no pesticides.)

Is Miracle-Gro acidic or alkaline? ›

Our liquid products are formulated to have a pH between 6 and 7 (close to neutral).

What time of day should I fertilize my vegetable garden? ›

Avoid fertilizing vegetable plants during the mid-day heat and sun. What is this? Instead, fertilize plants in the early morning or late evening to avoid any issues and maximize the nutrients.

How long does Miracle Grow soil feed? ›

Make extroverts out of your indoor and outdoor container plants with Miracle-Gro® Potting Mix. Specially formulated to feed plants for up to 6 months, this potting soil helps you grow bigger, more beautiful plants.

What plants is Miracle Grow good for? ›

Works best for flowers, veggies, trees, shrubs, roses and houseplants. The nutrients contained in this product mix easily with water. Makes feeding plants easy with the use of a watering can or a garden feeder for smooth and easy watering.

Should you water plants before fertilizing? ›

Another great tip is to water your plant before you fertilize it. It keeps the fertilizer from burning the roots, and the moist soil helps the fertilizer absorb better.

Should I use plant food or fertilizer? ›

Both plant food and plant fertilizer promote plants' healthy and faster growth. Plant food consists of the natural nutrients already in the soil (water, air, and light). Plant fertilizer only contains nitrogen (N), phosphorous (P), and potassium (K), which are essential macronutrients for plants.

Is 18 18 21 fertilizer good for tomatoes? ›

Grow More Tomato Plant Food 18-18-21 contains nitrogen, phosphorus, and potassium, the 3 major macro nutrients that plants need to boost its growth and development. This water soluble plant food comes in a 1.5-pound jar and ideal to use with all types of tomatoes.

Can you fertilize in 90 degree weather? ›

Applying either fertilizer or weed killer when it's hot out can damage your lawn. You're better off waiting until later in summer to fertilize.

What is the best fertilizer for hot summer? ›

Apply Low-Nitrogen Fertilizer

Whereas nitrogen-rich fertilizers are appropriate for the early springtime green-up and growth, as we just mentioned, they can cause further stress to lawns in the summer and even cause burns. That's why low-nitrogen fertilizer is a great option for summer lawns.

Can it be too hot to apply fertilizer? ›

Late afternoon or early evening (when there's still light, of course) is the best time of day to apply lawn fertilizer. Applying it in the heat of a scorching afternoon can cause the sun's rays to burn your grass—and when your goal is “lush and green,” burned grass blades simply won't cut it.

When should I stop feeding my plants? ›

Feed little and often instead of big, infrequent doses during the growing season and increase feeding with speed of growth. Stop feeding at the end of summer.

Should I feed my plants every time I water? ›

For soil growers, plants can be fed once every second or third watering. If plants are fed with every watering then nutrient buildup and lockup becomes a problem causing stunted growth, “crows foot” (curling downwards of the leaves), leaf burn, deficiency symptoms, burnt and damaged root system and decreased yields.

How long does Miracle Grow last after mixed? ›

Answer: We would not recommend to leave Miracle-Gro Water Soluble All Purpose Plant Food diluted longer than 24 hours. Water is the carrier and leaving it as a mixed solution for longer than 24 hours may allow it to loose it's efficacy.

What plants should not be fertilized? ›

If a plant naturally grows in dry sunny conditions, moist conditions will do it in. Perennials that require no fertilizer: Included are ornamental grasses, false indigo, ground covers, butterfly weed, bee balm, coneflowers, black-eyed Susans, sea holly, dianthus, asters and veronica.

Is it better to fertilize before or after rain? ›

When is the best time to fertilize a lawn – before or after a rain? Too much rain could wash away the fertilizer before it has a chance to soak into the soil, so plan to fertilize several days before a heavy rain arrives or several days later.

How often do you use 20 20 20 fertilizer? ›

Apply at the rate of 1 quart per square foot or 100 gallons per 400 square feet. Repeat treatment every 1-3 weeks as needed.

Should you water tomato plants daily? ›

Water newly planted tomatoes well to make sure soil is moist and ideal for growing. Early in the growing season, watering plants daily in the morning. As temperatures increase, you might need to water tomato plants twice a day. Garden tomatoes typically require 1-2 inches of water a week.

How do I get my tomatoes to grow bigger? ›

Tomatoes need plenty of room to grow. Commercially, most growers use a two-foot spacing within rows. If you want really large fruit, give them even more room. One of the most common errors by novice gardeners is planting tomato plants too close together.

Is coffee grounds good for tomatoes? ›

Coffee grounds contain around 2% nitrogen as well as varying amounts of phosphorus and potassium which are all very important for the growth of tomato plants. By mixing some coffee grounds into the soil below your tomato plants you're introducing these nutrients that the plants need to thrive.

Does Miracle-Gro damage soil? ›

Chemicals like Miracle-Gro urea-based fertilizer have since been found to kill soil microbes and cause loads of other problems in the environment and human health.

Which fertilizer has highest nitrogen? ›

The nitrogen fertilizer with the highest percentage of nitrogen is urea.

What is the most nitrogen rich fertilizer? ›

Fertilizers that supply the most nitrogen include urea (46-0-0) and ammonium sulfate (21-0-0). Due to its high nitrogen content, urea can damage plants when applied neat, so it's often sold mixed with other agents.

Can you water too much after fertilizing? ›

Watering to the appropriate levels after a fertilizer application is important. Too much and you can have run-off and diluted products. Too little and the fertilizer will just sit on the very surface of the ground and will not provide ideal conditions for the grass to take up the nutrients.

What happens if you water after fertilizing? ›

Why Water After Fertilizing? Watering after fertilizing washes the fertilizer off of the grass blades and into the soil, where it can get to work nourishing your lawn. It's also important because if fertilizer sits too long without being watered in, it can burn the grass.

What is a natural replacement for Miracle Grow? ›

Medina's HastaGro is an organic alternative for all Miracle-Gro products. This plant food promotes larger fruits and blooms without unnatural chemicals and toxins. HastaGro also prevents salt and chemical buildup in the soil, which is crucial for long-term gardening.

How do you dispose of Miracle-Gro? ›

Take your unused fertilizer in its original container with label to a garden outlet or other business that sells gardening chemicals. Gardening stores must dispose of unused chemicals in accordance with local, state and federal regulations, so they might accept your fertilizer for recycling and disposal.

Is Miracle Grow harmful to animals? ›

Miracle-Gro and Pet Safety

Miracle-Gro fertilizers are safe for dogs, and dogs can re-enter treated areas immediately after application. The Food and Drug Administration states the ingredients in these products are considered safe and are present in other nontoxic products you use in your home.

Does Miracle-Gro soil have pesticides in it? ›

(Miracle-Gro potting soil, for the record, contains synthetic fertilizer but no pesticides.)

What is better than Miracle Grow? ›

When comparing worm castings vs. Miracle Gro, worm castings are the right fertilizer choice as they promote better plant growth. Miracle Gro could burn your plants if not used properly.

Does Miracle-Gro have a lot of nitrogen in it? ›

Ingredients. Miracle-Gro Water Soluble Plant Fertilizer includes a high concentration of nitrogen, phosphorus and potassium which are three nutrients found in all fertilizers to assist with plant growth and development.

Should you use Miracle Grow everyday? ›

For best results, feed your plants every 7-14 days.

How long does Miracle-Gro last once mixed? ›

We would not recommend to leave Miracle-Gro Water Soluble All Purpose Plant Food diluted longer than 24 hours. Water is the carrier and leaving it as a mixed solution for longer than 24 hours may allow it to loose it's efficacy.

How long does fertilizer last once applied? ›

They take about a week for the improvement to show and last about three to four weeks. Slow-release granular fertilizers decompose and begin to improve plants about two weeks after applied, and they last anywhere from two to nine months.

Will Miracle-Gro hurt leaves? ›

All-purpose plant food is recommended for use in liquid form on the foliage of outdoor flowers, vegetables, shrubs and trees. Never put dry fertilizer on leaves. It will burn them.

Does Miracle Grow have bugs? ›

Brands like Miracle-Gro bagged soil have been found to sometimes contain small black flies, but the existence of these bugs in the soil is not that surprising. The little black bugs you found in your bag of Miracle-Gro soil are likely fungus gnats, which are known for infesting unsterilized soil.

Is Miracle Grow toxic to worms? ›

Miracle-Gro, for example, contains ammonium phosphate and several other chemicals that can be toxic to soil, plants, and worms.

Does Miracle Grow use chemicals? ›

Miracle-Gro is a synthetic fertilizer that contains ammonium phosphate and several other chemicals that can be toxic to your soil and plants. It is prohibited from use in certified-organic farming.

Is Miracle Grow harmful to bees? ›

Answer: Miracle-Gro Garden Feeder does not contain insecticide therefore should be safe for bees if used as directed. Some blooming plants that have been treated with insecticides may be less attractive to bees over time.

Is Miracle Grow harmful to birds? ›

Yes, Miracle-Gro Liquid All Purpose Plant Food Concentrate is safe for birds and wildlife when used as directed.


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