When to Water After Applying Weed and Feed

A good rule of thumb is to wait 24 to 72 hours before watering a treated lawn. Here’s when to water after applying a weed and feed by the type of product:
• Granular post-emergent: Wait 24 to 72 hours before watering to allow granules to dissolve on weed leaves.
• Granular pre-emergent: Water within 3 days with ½ inch or more to get the herbicide into the soil.
• Liquid weed and feed: Wait 24 to 48 hours before watering to avoid dilution.

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