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.
Page 1 of 3. 1  William253 Member. I'm just curious to see what other growers think of miracle gro for their plants. 2  Prefontaine Well-Known Member. I would only use the tinniest amount of miracle grow in conjunction with good nutes. 3  Izoc666 Well-Known Member.