Very glad to come across this forum. I've got several large bags of preen that I picked up new at a garage sale for next to nothing but have been afraid to use it as I did not know how and the words on the bag don't answer the obvious questions. So effective for up to 90 days and okay to get on existing plants, right? Does that include veggies? Thanks!
Preen weed killer is a pre-emergent herbicide that is safe to use around flowers, vegetables, trees and other desirable plants. Once activated by water, this granular weed killer creates a 1- to 2 inch-weed-killing barrier beneath the surface of the soil that prevents weeds from germinating. Preen can be used during any time of the year but, like most pre-emergent herbicides, should not be used over flower seeds as it will stop them from germinating.
Read more: How to Use Preen Weed Killer | Garden Guides http://www.gardenguides.com/100801-use-preen-weed-killer.html#ixzz1...
Just saw this...thanks, Bonnie.