Plan the perfect garden with our interactive tool →

Miracle-Gro Ingredients

...
urea - harnstoff image by Cornelia Pithart from Fotolia.com

Miracle-Gro is a popular, easy-to-use fertilizer for ornamentals, vegetables, fruit trees, lawns and houseplants. It is made by the Scott’s Company, with the goal of making it easy for all gardeners to grow large, healthy plants. Although it’s a synthetic plant food, Miracle-Gro is considered a safe product, but it is not permitted for use in certified organic farms.

N-P-K Ratio

According to the Scott’s Company, their standard Miracle-Gro product has an N-P-K ratio of 15-30-15, making it high in nitrogen, phosphorus and potassium, with the highest nutrient concentration being phosphorus, an essential plant nutrient.

Ammonium Phosphate

One of the main ingredients of Miracle-Gro is the chemical ammonium phosphate, which can have toxic effects on soil and irritate human mucus membranes, according to Cameo Chemicals. This ingredient is one of the most commonly used fertilizers because it has a high percentage of phosphorus—up to 46 percent, according to Simplot.com.

Urea

According to MedTerms.com, urea is a substance that contains nitrogen which the kidneys clear from blood before the body excretes it as urine. Urea is a common additive in fertilizers; some people even believe that watering plants with their urine can be beneficial. Urea is found in natural forms in urine and was the first chemical compound to be synthesized. Urea is ammonium cyanate.

  • Miracle-Gro is a popular, easy-to-use fertilizer for ornamentals, vegetables, fruit trees, lawns and houseplants.
  • According to the Scott’s Company, their standard Miracle-Gro product has an N-P-K ratio of 15-30-15, making it high in nitrogen, phosphorus and potassium, with the highest nutrient concentration being phosphorus, an essential plant nutrient.

Potassium Chloride

This chemical ingredient found in Miracle-Gro is a white crystal or crystalline powder that helps plants increase their growth and productivity. However, potassium chloride can be harmful to humans if it is swallowed; it may cause irritation of the skin, eyes and lungs if high concentrations of this substance are inhaled.

Inert Ingredients

Although some chemical fertilizers contain heavy metals such as lead, arsenic, mercury, barium, cadmium, copper, nickel and others as fillers or inert ingredients, according to the book “Fateful Harvest,” Miracle-Gro was tested along with other home fertilizers and was found to be “clean” of toxic metals.

Related Articles

Fertilizers High in Phosphorus
Fertilizers High in Phosphorus
How Does Miracle-Gro Work?
How Does Miracle-Gro Work?
The Effects of Urine on Tomato Plants
The Effects of Urine on Tomato Plants
What Does Phosphorus Do for Plants?
What Does Phosphorus Do for Plants?
Is Knox Gelatin Good for Houseplants?
Is Knox Gelatin Good for Houseplants?
How to Use Eggshells for Plant Fertilizer
How to Use Eggshells for Plant Fertilizer
Ammoniacal Nitrogen Fertilizer vs. Urea Fertilizer
Ammoniacal Nitrogen Fertilizer vs. Urea Fertilizer
How to Make Liquid Bone Meal Fertilizer at Home
How to Make Liquid Bone Meal Fertilizer at Home
Alternatives to Nitrogen Fertilizers
Alternatives to Nitrogen Fertilizers
Miracle-Gro's Effects on Humans
Miracle-Gro's Effects on Humans
The Effects of Antifreeze on Grass
The Effects of Antifreeze on Grass
Ingredients in Liquid Fence
Ingredients in Liquid Fence
Capsaicin as an Insecticide
Capsaicin as an Insecticide
Insecticidal Soap Ingredients
Insecticidal Soap Ingredients
Inert Materials in Fertilizers
Inert Materials in Fertilizers
Ingredients in Miracle Grow Plant Food
Ingredients in Miracle Grow Plant Food
List of Plant Fertilizer Brands
List of Plant Fertilizer Brands
Garden Guides
×