planting corms with a pre-immergent in the soil
I planted a good sized area of my woodland garden three weeks ago with some beautiful plants. Several days later I sprinkled organic PREEN around to keep the weeds down. Now I have gotten some local Trillium corms and want to plant them around the other plants already in the ground. It has rained twice in the last two weeks to work it in. Am I safe to plant the Trillium corms or will it stunt or even prevent the corms from sprouting?