Seed Germination... - Knowledgebase Question

WOODBURY, Ne
Question by pooch_1972
March 12, 2009
When is the right time to overseed in spring? What temperatures are best for the seed's to germinate? And conversely at what temperatures do crabgrass start to germinate? I live in the North East.


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Answer from NGA
March 12, 2009

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Crabgrass starts to germinate when temperatures are 50F or over for 5-7 days in a row. Turfgrass seeds will germinate when soil temperatures are about 40F but they prefer warmer temperatures. The last frost date for your gardening region is somewhere between May 13 and May 28. With that in mind, you can begin overseeding your lawn by mid-May and the seeds should sprout in about 10 days. You can overseed as late as mid-June and still have a nice green lawn by mid-summer. Best wishes with your lawn!

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