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Why you shouldn't use Miracle-Gro?

Author

Emily Sparks

Published Jan 20, 2026

Miracle-Gro supplies an enormous amount of nitrogen for plants so that they grow big, bushy, green, and fast. 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.

Why you should not use Miracle-Gro?

Why Is Miracle-Gro Bad? Depending on the Miracle-Gro products you use, Miracle-Gro may have high levels of salt, which over time strip your soil of its natural nutrients and prevent plants from absorbing them, causing a type of “lawn burn.”

Is Miracle-Gro safe to use?

According to Miracle-Gro, the All-Purpose formula is completely safe for vegetables. As long as you use the product as directed, you shouldn't encounter any issues. The fertilizer contains no known carcinogens, making it safe for humans.

Is Miracle-Gro killing my plants?

When using small portions of Miracle-Gro Liquid, it can cause FATAL fertilizer burn, which is a condition that results in the burning or scorching of foliage. According to the product label "all plants" should be able to tolerate a little fertilizer without suffering yellow or brown discoloration and root damage.

What happens if you use Miracle Grow everyday?

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.

19 related questions found

What can I use instead of Miracle Grow?

10 Miracle Gro Alternatives To Check Out!

  • 1.1 1- Scotts Turf Builder Lawn Food.
  • 1.2 2- Jobe's Organic Flower & Rose Granular Fertilizer with Biozome.
  • 1.3 3- HastaGro.
  • 1.4 4- Jacks Prof 77010 General Purpose Fertilizer, 20-20-20 Fertilizer.
  • 1.5 5- AgroThrive All-Purpose Organic Liquid Fertilizer.
  • 1.6 6- Homemade Miracle Grow.

Can I just sprinkle miracle grow around plants?

It offers faster delivery of nutrients via plant tissue and arteries but isn't recommended for houseplants and should only be used on outdoor plants when weather conditions are favorable.

Is Miracle-Gro absorbed through leaves?

Application. All-purpose Miracle-Gro plant food, tomato food and rose food can be applied to the foliage and allowed to soak into the soil. Nutrients from these formulas are absorbed through the leaves of your plants, giving them a quick burst of energy.

Is Miracle Grow Organic Really Organic?

Is Miracle-Gro Organic? 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 toxic to organic gardens.

Is it safe to use Miracle Grow on herbs?

Miracle-Gro Water Soluble Plant Food Vegetables & Herbs feeds your garden instantly and easily. It's great for tomatoes, squash, peppers, cucumber, carrots, basil and other herbs and vegetables. Also, use Miracle-Gro Water Soluble Plant Food Vegetables & Herbs with Miracle-Gro Soil for even more harvest (vs. unfed).

When should I use Miracle-Gro?

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.

Is Miracle-Gro safe for vegetables?

Miracle-Gro Water Soluble All Purpose Plant Food is safe for all plants guaranteed not to burn when used as directed and starts to work instantly. Use on all flowers, all vegetables, houseplants, roses, and all trees and shrubs.

Is Miracle Grow a chemical?

'Miracle-Gro' and many other plant foods are chemical fertilizers. I prefer organic fertilizers. They offer a spectrum of nutrients, including micronutrients, not just the “big three.” Nutrients in organic fertilizers are made available to plants through microbial decomposition.

Does Miracle Grow have potash?

Answer: Miracle Grow Garden Pro Bloom Booster is a great product to ehlp Gerniums needing potassium. We also have a product called Hi Yield Muriate of Potash which contains 0-0-60. The only downfall it is labeled for plants which develop below ground such as dahlias, gladiolas, potatoes, carrots, onions, etc.

Can I use Miracle-Gro All Purpose Plant Food on my lawn?

Please note that All-Purpose Miracle-Gro will help facilitate grass to grow, but it isn't the most efficient way to fertilize your lawn. For the best results, choose Miracle-Gro's water-soluble Lawn Food to provide your yard with the necessary nutrients to become green, healthy, and lush!

How fast does Miracle-Gro fertilizer work?

12 hours should be way more than enough time for M-G to work, especially if applied to the leaves. Water soluble fertilizers can start working immediately.

Can I put Miracle-Gro directly on soil?

Continuous release plant foods, such as Miracle-Gro® Shake 'N Feed® All Purpose Plant Food, usually comes in granular form, and the nutrients are released slowly over time. Mix this type of fertilizer directly into the soil surrounding the plant.

Why is Miracle Grow blue?

The blue color of those crystals is derived from copper sulfate. I've grown over 150 vegetable & flower gardens and I have never seen nor heard the need of using copper sulfate in the garden, except as a fungicide.

Can you sprinkle plant food on soil?

Choose continuous-release plant granules, like Miracle-Gro® Shake 'n Feed® All Purpose Plant Food, for less frequent feeding. Sprinkle the easy-to-use, dry granules onto the soil surface, gently rake them into the top few inches of soil, then water thoroughly to start the feeding process.

Is Epsom salt good for plants?

Yes, there seem to be good, relevant reasons for using Epsom salts for plants. Epsom salt helps improve flower blooming and enhances a plant's green color. It can even help plants grow bushier. Epsom salt is made up of hydrated magnesium sulfate (magnesium and sulfur), which is important to healthy plant growth.

Which plants like Epsom salts?

3 Plants That Benefit From Epsom Salt

  • Pepper plants: Peppers need extra magnesium, especially if you grow them in pots.
  • Roses: Rose bushes benefit from the magnesium in Epsom salt.
  • Tomato plants: While some Epsom salt can benefit vegetables and can help increase the flavor profile, too much can lead to blossom end rot.

When should you put Epsom salt on plants?

Ideally, do this in springtime just as new leaves are emerging, and again after blooming. Epsom salts can also be added to water and used as a soil drench, watering the plant at the soil level. When planting, you can add Epsom salts directly to the soil, or work it into the soil without diluting it in water first.

Does Miracle-Gro contain arsenic?

I went to three stores and bought six popular brands of bagged soil labeled for fruits and vegetables -- Miracle-Gro, SuperSoil, EarthGro, Kellogg, Sun Land and E.B. Stone -- and sent samples of each to two labs to corroborate the results. The findings: None of the soils contained toxic levels of lead, zinc or arsenic.

Does Miracle Grow have lead?

Miracle-Gro contains 0.15 ppm Lead. In comparison, vegetables grown in areas not exposed to industrial pollution contain zero to 0.26 mg of lead per pound (Reference #14), while a liter of Miracle-Gro Powder contains 0.15 mg.

How do you use Miracle-Gro All Purpose fertilizer?

Use With a Watering Can.

For Outdoor Plants: Mix 1 tablespoon of Miracle-Gro for every gallon of water. For Indoor Plants: Mix 1/2 teaspoon (not tablespoon) per gallon of water.