I’ve read about the pre-emergent herbicide PREEN. It sounds like it’s quite effective, but does it persist in the environment/flower bed?? Does it harm the soil and/or the plants/perennials you're growing?? And, most importantly (for me, anyhow), is it harmful to pets??? (cats, in particular)

Submitted by shan_kat7

There are a couple different formulations of Preen. One contains only corn gluten as the active ingredient. The other uses the chemical trifluralin as the active ingredient. If you're concerned about pesticides, you may want to choose the natural corn gluten formulation. Trifluralin has been in use for decades and is considered quite safe.

Answered by DSchrock
Community Answers (2)

I would never use Preen after researching the active ingredient. Sounds harmful to me, my family and pets. I will err on the side of caution here and get a little exercise pulling the weeds. I do not trust the EPA registered pesticides. Preen is a pesticide (pesticide is a term used for herbicides (vegetation killers), pesticides (insect killers) and rodenticide (rodent killers). If you use a nice layer of a natural mulch, your weed population is decreased anyway, looks beautiful and is safe.
Submitted by dianestjohn06