Using a residual herbicide in onions. What effect will it have on future crops?
kipps
Posted 3/17/2026 16:20 (#11588166)
Subject: Using a residual herbicide in onions. What effect will it have on future crops?



Madison Co. Virginia
I'm planting out several thousand onion seedlings in about a week, and have never attempted to keep after that many before. I figure if a herbicide will help avoid weed germination, I can use all the help I can get. I'm looking at Prowl h2o, a pendimethalin herbicide that should be fine to spray over top of the transplanted onion seedlings once or twice early in the growing season. If I wanted to go back into that same plot with beans, carrots, or any other direct-seeded crop after the onions come out, would the Prowl cause me any trouble with that?

Organic practices aren't a particular concern here.

Edited by kipps 3/17/2026 16:22




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