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Bermuda winter kill?

11K views 29 replies 13 participants last post by  ChocoLab  
#1 · (Edited)
My Bermuda lawn has mostly greened up. But I have many spots that are completely brown still. I live in the Atlanta area and we had 8 degrees F on Dec 24, 2022. The previous 3 winters the coldest it got was 22.

Notice in the soil temperature chart below, the soil temperature went down to 26 degrees on Dec. 24th. This is much colder than normal. Normally it will stay above freezing all winter in the Atlanta area.
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Worst places seem to be in some low spots in the yard that tend to collect water and stay more moist and therefore conduct the cold down to the roots and break the roots and crowns by the expanding ice as it freezes.

Anyone else seeing this?
 
#4 ·
My Bermuda lawn has mostly greened up. But I have many spots that are completely brown still. I live in the Atlanta area and we had 8 degrees F on Dec 24, 2022.

Worst places seem to be in some low spots in the yard that tend to collect water and stay more moist and therefore conduct the cold down to the roots.

Anyone else seeing this?
I seeded my Bermuda last summer and came into spring with the same issue. Definitely winter kill in my case (ruled out disease and insects). Low spots that collect water definitely hardest hit. I was about 60% green. I've pushed growth for the past 30 days with Urea & Potash and I've sprayed a good bit of RGS to push some roots. I'm about 85% filled in now and we really haven't gotten to prime growing temps yet. I suspect by the end of May I'll have 100% coverage. I would think your's will bounce back as well (without seeing pics or knowing how much coverage you have currently).

BTW I'm in Central MS.
 
#6 ·
I would think your's will bounce back as well (without seeing pics or knowing how much coverage you have currently).
It's a large back yard with large brown patches but yes, by the end of the summer it will probably grow back in.

I have been filling in the very lowest spots with dirt. Wife says I should just give up and dig a pond. :D
 
#10 · (Edited)
Problem is that will just create a clay "bowl" filled with sand. Water will run through the sand but not be able to get out of the bowl. That area will continue to stay damp.

The lot has a slight slope to the rear. If I can eliminate the low sports where the water collects, the excess water will run off the back of the yard.
 
#13 · (Edited)
agreed, not SDS. Looks like nothing wants to grow there!
Saturated soils lack oxygen, killing off any plant growth. Your pics look like that may be the case. I’m just brainstorming at this point but I highly doubt it was winterkill of any kind. Looks more soil related.
I know it is winter kill. Grass was growing well in the fall. Only reason for the question mark in the title was to see how many others are seeing it.

"primarily dependent on moisture, low temperature and the duration of low"

"When turfgrass plants are exposed directly to a rapid decrease in temperature below 23°F (5°C), the injury can be lethal"

"
Crown Hydration. When turfgrass plants remain in or under constant moisture following a thaw, crowns of the plant can absorb (imbibe) high levels of water. If temperatures then decrease below freezing, ice crystals form within the plant cell walls (or intracellularly), rupturing them and, thereby, killing tissues."
 
#19 ·
I have a hard time thinking of 'winter kill' as a condition, ie disease, as opposed to an effect. An effect of weak turf, low oxygen, etc etc etc.
But this latest picture sheds a whole new light on things! Not a good situation to deal with.
Yep, but despite all that water, it was green last summer. The bare spots in the back are not the same as the new one I posted above. The ones in the far back are a result of shade from the trees.
Image
 
#22 ·
My Bermuda lawn has mostly greened up. But I have many spots that are completely brown still. I live in the Atlanta area and we had 8 degrees F on Dec 24, 2022. The previous 3 winters the coldest it got was 22.

Worst places seem to be in some low spots in the yard that tend to collect water and stay more moist and therefore conduct the cold down to the roots.

Anyone else seeing this?
I live in the Athens area and I’ve dealt with this for the last few years. I’ve determined that it is spring dead spot, which is probably the worst news you could get. I’ve treated multiple years in a row (can only treat in the fall) and I’ve put new sod into dead spots. It keeps coming back each spring worse and my yard is slowly being taken over. My worst area is a side hill, but it has spread into the main parts and backyard.

I’m going to contact UGA and see what else I can do, but it’s super frustrating and looks terrible.
 
#27 ·
With temperatures going to the low teens this week, ground temperature is projected to go below freezing.
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I have some week spots that were still growing in during the fall. Grass is thin and as low as a putting green in these spots, so I'm going to try a tarp over it this cold spell.
 
#28 · (Edited)
#29 ·
I feel like someone may have posted that or a similar link in the past, as the content seems familiar. The basics of winterkill seem to be that it has a higher impact on bermuda when the cold comes suddenly (no hardening-off period); when the cold goes below 23 degrees; when the cold is accompanied by wet conditions; and when it's stressed by something else (e.g. foot traffic).
 
#30 ·
I'm with the OP. I've definitely had some winter kill the last few years of extreme winters here in central north Texas. (This winter looks to be much more normal with only a couple of nights at 10* or below.) I actually didn't realize how much winter kill occurred each year until I read that OK State document a few years ago... I read their material quite a bit as my weather is more like theirs than that at Texas A&M.

I think we don't realize how much winter kill occurs some years because, with decent rains, bermuda recovers and re-spreads so quickly in the spring and summer. I also think people in the more moderate and rainy Southeast don't see this as often, especially those with hybrids.