The best time to get an e?ective weed kill is around four to eight weeks after reseeding. Ground conditions have improved, which will help you to get on to land that was ploughed to facilitate spraying. Leaving weeds unchecked in the new sward will slow down the establishment of new grass plants and reduce tillering of the sward. Before spraying, walk the reseed and determine what weeds are present, and then choose a product to suit that will give the most effective kill. Pick a clover-safe spray if you want to establish a clover-rich sward.
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