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Old 10-19-2011, 06:42 PM  
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Default crabgrass preventer

I believe the very best time to use crabgrass preventer is in the late fall, in the next few weeks. Second best time is in the very early spring assuming bare ground, say first couple weeks of March.

However, my mother wants to aerate and overseed in the late April so I am telling her we should spread the HALTS right after we get up all the leaves. If we do the HALTS in early March, her overseeding would be HALTed so to speak. Her 'friends' think I am wrong and she should do the HALTS in the spring.

I believe the crabgrass seeds are laying around and it doesnt matter when you hit them with the HALTS as long as you do it before they sprout. ie, April/May is way too late.

Am I right or wrong?

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Old 10-20-2011, 08:36 PM  
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According to the Scott's company instructions for applying Halts it shoud be applied in the early spring before the crab grass germinates. Also according to the literature disturbing ther soil after application such as areating or tilling interferes with HALTS. Link below leads to better explanation.

When to Apply Halts Crabgrass Preventer |
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