weeds - Knowledgebase Question

norman, Ok
Avatar for teresita
Question by teresita
March 23, 2009
I see a lot of weeds in my flower beds. is it bad for the flowers (perennials) if I spray some round up before I put the mulch?. Is there any organic type of round up? What do I need to do to prepare the soil before the spring?

Answer from NGA
March 23, 2009
Round Up is a vegetation killer so if you use it in your flower beds it may also kill your flowers. If there are a lot of weeds you may want to remove your perennial plants and rework the bed to not only remove the weeds but to also incorporate some organic matter to loosen and enrich the soil. After removing your plants and pulling all visible weeds (roots and all!), spread 4-5 inches of organic matter over the soil. Use compost or aged manure or whatever is locally available. Dig it in to a depth of 8-10 inches, level the soil and replant your perennials. You can then sprinkle a pre emergent herbicide over the bare soil (Preen, or another corn gluten based pre emergent) and cover over that with mulch. You bed should remain weed free all season long.

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