What Is Miracle-Gro Potting Soil Made Of?

The right soil makes plants healthier and more productive.

The primary ingredients in Miracle-Gro potting soils are peat moss, compost and perlite, according to product packaging and literature provided on The Scotts Company website. Some products contain additional ingredients to benefit the plants for which they are intended.

Organic Potting Soil

Miracle-Gro's organic mix contains 10 percent nitrogen, 5 percent phosphorous and 5 percent potash, derived from poultry litter. The mix also contains composted bark and an organic wetting agent.

Miracle-Gro Potting Mix

This product contains Miracle-Gro Continuous Release Plant Food, composed of 21 percent nitrogen, 7 percent phosphorus and 14 percent potash.

Seed Starting Mix

This potting mix contains 5 percent nitrogen, 1 percent phosphate, and 5 percent potash, derived from urea, ammonium phosphate and potassium nitrate. It also contains a wetting agent.

Miracle-Gro Moisture Control Potting Mix

Composted coconut hulls are added to this product. Called Aqua Coir, this ingredient is added to increase water absorption.

Fertilizers

Some Miracle-Gro potting soils contain Osmocote fertilizer, which appears as clear, fluid-filled balls, according to company literature.

Further Information

State Department of Agriculture regulations governing fertilizers and pesticides can be found at http://www.regulatory-info-sc.com.

References

• The Scotts Company: Miracle-Gro Product Information

Resources

• North Carolina State University: Fertilizing Houseplants, Eve Evans
• GardenGuides.com: Guide to Container Gardening