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Frost at 45 degrees

Posted by oceanfrank none (My Page) on
Tue, Mar 6, 12 at 5:13

I have zoysia grass in north Florida. The weather is very warm now 78/58 for the next ten days. Since the yard was already starting to green, I went ahead and cut,and bagged the yard down to two inches. Was just too nervouse to cut lower since this is my first spring with the lawn. It looked so dead while all the st. Augustine's lawns are so green. Anyway, on Monday the temp said it was going to drop to 45 degrees, so the night before I watered each zone for 50 min to make sure no frost issues would occurs. Next mornings awoke in horror to see entire lawn frosted over at 45 degrees. After doing research I found out frost can occurs up to 45 degrees with perfect conditions. Hence question....didi just kill my entire lawn? Is there anything I can do now that temp is back to 78/58 for the next ten days? Should I cut it shorter? I was going to hold on on fertilization until lawn half green, but should I start now?


Follow-Up Postings:

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RE: Frost at 45 degrees

Relax no harm done. Don't do anything until you see it all greened up. At that point then you can fertilize, wait 10 weeks then apply your last fertilizer application for the season.. Well in Florida you can apply a 3rd application 10 weeks later if really needed but I do not advise it. What kind of Zoysia is it. Do you know?


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RE: Frost at 45 degrees

Thank you for the response. It is Empire Zoysia. We bought a foreclosure last January, and decided to install Empire Sod over the entire yard (in place of the current mud). Last year by mid-summer the yard look incredible. Then in December is started to turn to straw...chuckle...but that was already expected. Things were going like clock work, until Monday night. At least that was my fear until reading your response.

I had cut it down to two inches, but was still fear full of cutting it to what I am reading is 1 inch. Thoughts on cutting it that low?


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RE: Frost at 45 degrees

OK sounds like you have been maintaining your Empire Zoysia too high to start with because the recommended cutting height is 1 to 2 inches. So armed with that info cut no higher than 2 inches, and no lower than 1 inch with a rotary mower.

Relax when you see it starting to green up apply some slow release urea 15-10-5 fertilizer at a rate 6 pounds of product per 1000/ft2. Be careful with Zoysia not to kill it with kindness by applying too much fertilizer. You only need two application per growing season. If you push too much fertilizer on it will cause excessive thatch problems which leads to insect, disease, and fungal problems all of which can kill the grass.

With Zoysia it is a good idea to de-thatch your lawn once a year as it tends to be a heavy thatcher. The grass blades are very tough, and the clippings decay very slowly. Keep your mulch mower blades sharp so it chops up the clippings into little pieces. So keep your eye out for thatch.


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