Post emergent weed killer - Knowledgebase Question

Champaign, IL
Question by sjoher
July 22, 2007
Recently We spray post emergent crab grass treatment and after 7 days some of them were dying and some of them are still look fresh. Most of them were have seeds. I move them now. My question is I heard that these seeds can grow back into weeds quickly. Do I treatment my lawn with Pre-emrgent weed control and also treat with post emergent treatment as still some root and aprt of the weeds stalk are still there.

Answer from NGA
July 22, 2007


I'd use a pre-emergent herbicide to keep the seeds from germinating and growing into weeds. Corn Gluten meal is a good pre-emergent and is available in most garden centers. Surflan is another pre-emergent product. Be sure to read and apply according to label directions.

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