moss in lawn - Knowledgebase Question

Everett, Wa
Question by frenchiequil
February 23, 2009
the moss has practically taken over the lawn in my backyard. What do I need to do and when should it be done? Thank you


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Answer from NGA
February 23, 2009

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Moss thrives when conditions favor its growth. Too much shade, compacted soil, poor fertility, poor drainage, and low pH all contribute to moss in lawns. If you can correct all (or most) of these problems, you'll have less moss in the lawn. I'd skip the moss killer. It will kill the moss, but you'll need to change conditions or it will come right back. Go ahead and dethatch, then rake up all the dead stolons along with the moss. Reseed any bare areas. Then put your lawn on a regular feeding schedule, mow frequently, and water as needed. These steps will help the grass grow lush and thick enough to crowd out any moss. Washington State University recommends fertilizing in April, June, September, and the first week of December with a 3-1-2 ratio of complete fertilizer (21-7-14 is a good choice). You may want to have the soil tested because it is likely your soil pH is too low. If that proves true, you'll be advised to add lime. Fall is the best time add lime, but anytime is okay. Following the above guidelines for a healthy lawn should greatly reduce the amount of moss you find in your yard.

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