The Q&A Archives: Nut grass in St. Augustine lawn

Question: We have a primarily St. Augustine lawn, but we're plagued by the annual appearance of nut grass. Aside from pulling, which we have done in the past, are there any other methods for controlling or eradictating this bothersome plant?

I've already applied two applications, which is the yearly amount according to the directions, of Ortho's Weed B Gone to control the late winter clover. I've also applied one application of Scott's Bonus S fertilizer and I'm not due for another application for 3 more weeks.

Answer: If the nutgrass is truly an annual that sprouts from seed, you can apply a great organic control from Gardens Alive called WithOut Weeds. It's just corn gluten, a by-product of corn processing. An enzyme in the gluten inhibits seed germination. This won't affect the spread of St. Augustine grass, which propagates primarily via runners. Corn gluten also contains nitrogen and other nutrients, so it's like a natural "weed-n-feed", only better, because it's safe for all creatures except seeds! You can cut back on your next fertilizer application, too. Contact Gardens Alive at or ph# 812/537-8650. Good luck!

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