Definition of undergrowth for Students. : low growth on the floor of a forest that includes shrubs, herbs, and saplings.
From Organic Gardening Magazine, July/August 2000 Issue. 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.
Dr. Wallace also warns that products such as Miracle-Gro often contain unsafe levels of zinc and copper that will be toxic to soil life. And if all thatâs not enough to convince you to avoid this stuff, consider this: you have to mix Miracle-Gro with water and apply it ever 7 to 14 days.