Fred from Seattle, Wa writes
Pennington Pro Care Crabgrass Control Plus .37 Prodiamine 0-0-7 should be applied prior to germination of target weeds. If Crabgrass is your target weed, the right time to apply is when the soil temperature at a depth of one inch is greater than 55 degrees for at least a week. It would be a good idea to contact your local cooperative extension office for advice on the best time to apply in your specific region.
Answer last updated on: 01/22/2018
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