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poa annua question
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Posted by v1rtu0s1ty Zone 5a, Northern IL (My Page) on Wed, Oct 21, 09 at 19:14
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RE: poa annua question
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| Poa Annua should die in winter. The Annua part of the name is because it's an annual. However, there are now some varieties of poa a. that will survive the winter. It's not likely that you have one, but they do exist. |
RE: poa annua question
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| But here's the rub, poa annua, is a winter annual (there are actually many varieties, some are perennials, just to make your life that much better). So what that means is the seeds sprout in fall, and the plant lies dormant in a vegetative state over winter, not dying like bpgreen stated. Then come spring it produces many seed heads, and can do so at very low mowing heights. (Seeds in the soil can germinate in spring as well.) It's these seed heads that most people find so offensive, plus it grows faster than most turf and is lighter green as well, so it sticks out like a sore thumb even when it isn't producing seed. It usually dies in the summer from the heat, but at that point it has put down thousands of seeds ready to sprout when soil temps are lower in the fall. There are a few selective herbicides out there that will kill poa annua, like bispyribac-sodium (Velocity) and ethofumesate (Prograss), but they are expensive, and not easy to use. Usually a few years of preemergents in the late summer and early spring will greatly diminish poa annua in your lawn, but that also means you can't overseed because of the preemergents. |
RE: poa annua question
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| I think I have poa annua in front. I'm seeing many lighter green blades. I'm still wondering where I got it. I never had poa annua in front lawn. Maybe the sod quality seeds I received from Williams accidentally had poa annua seeds. Anyways, I'm glad that they will die in winter. Hopefully, Lesco Dimension will be able to control them next spring. Thanks for all the information. :) |
RE: poa annua question
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| It won't die this winter, it will be dormant in the winter and produce seeds in the spring. It usually dies in summer heat and reduced water. I have the seed producing variety and one that doesn't seed, it just grows tall and light green. P. annua is everywhere, there are many different types, and the seeds are tiny. You might have gotten them from a neighbors lawn, or they can lay dormant for years as well, only to germinate when conditions are right. Also when you certify seeds as being weed free, you only have to screen a very small amount, so being weed free is true for a small sample, but not necessarily the whole bag. |
RE: poa annua question
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| Using ethofumesate (Prograss) will kill it. I know since I spent the $380 for the 2.5g...And you can re-seed at the same time per the label... |
RE: poa annua question
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| Awesome! Prograss will kill P annua. Wife will kill me too! :D
I don't want to spend that huge amount. I was told by Morpheus that I can use round up. I also read earlier that Dimension will not kill it. :( I was planning to buy Dimension since I read somewhere that it can also prevent poa annua. |
RE: poa annua question
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| Round-up will kill everything, not just poa annua, so use it sparingly. Dimension will act as a preemergent for poa annua, reducing the amount of seeds that germinate over time if you use it religiously in the spring and late summer. |
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