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.
The answers to your questions are: 1.) I put the miracle grow on in the early morning, and the Sevin was put on at dusk. 2.) The miracle grow was mixed with water and the sevin is a powder you dust the plants with. 3.) We have also planted tomatoes, cucumbers, onions and lettuce. None of those are affected.