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Old 05-09-2008, 12:53 PM   #1
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Thistles


We have landscaped around a newer construction home with large river rock. The thistles are so bad, we could literally weed everyday just around the perimeter of the home. Should we take everything out and redo it. We laid fabric before putting stone down and use a lot of round up weekly, but the thistles keep coming back stronger

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Old 05-09-2008, 01:50 PM   #2
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Thistles


after all studies from internet... it reiterates that the fibre memberance is a waste of money by reading your case, unfortunately.. another Big Box store glemic to eat consumer money without reason, another example is those grout sealer....anyway... Probably your situation is contributed by two factors:

1. the so call fibre got broken up somewhere by the rocks above and traffic ...

2. there are voids in the rocks to accumulate dirt to become a good bedding ground from those plants...

so looks like redo it is the only way if you want to resolve this problem... and you probably need to forget about the fibre approach and use tradditonal landscape 4" sub-base and compacting ...etc.

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Old 05-12-2008, 10:43 AM   #3
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Thistles


x2 on the fiber - I just ripped up a bunch that the weeds were growing inside of. It holds moisture, so weeds like it. Roundup won't work on weeds, but it sure will kill grass. Go to a DIY chemical store and get a pre-emergent and some concentrated weed killer.
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Old 05-14-2008, 08:31 AM   #4
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Thistles


Forgive me if it's politically incorrect, but roundup will work. DON'T TRY TO WEED except when the flowers first open in early spring. Once that time is past, every time you disturb the roots, you are encouraging it to spread. Roundup will kill it, and once it's all dead you can remove it. Remove it carefully and far away--no composting.
i hope this helps
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Old 05-14-2008, 01:48 PM   #5
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Politically incorrect? Terminal redundancy?

We have weeds on steroids here - tolerant to everything. Drought, fire, salt, motor oil...and I'm having trouble re-planting native weeds in a livarium for tortoises to eat - go figure.

If you look at the chemical percentages on the label, Roundup is severely watered down compared to standard professional herbicide. I bought it to see how good it really worked. The weeds I sprayed and haven't pulled yet are still growing after 3 doses, but the hearty bermuda/goathead/crabgrass turned yellow shortly after the first spray.

Your results may vary.
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Old 05-14-2008, 05:13 PM   #6
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Thistles


Can we agree to disagree? No doubt professional stuff is better. I use some ag stuff myself. But I have used roundup on weeds including thistles successfully. The main point I wanted to make was just trying to pull them out is the worst thing you can do with thistles unless you're going to dig them up with a backhoe. Breaking up the roots just encourages propagation, and even the tiniest bit of root left with sprout again.

I hope this helps,
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Old 05-17-2008, 01:47 PM   #7
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Thistles


I bought a home with a neglected garden that was overrun with thistles. I actually went and dug up the roots, and that seemed to help, but they would keep on popping up anyway. But as soon as one came up I'd apply Round Up to it. So for one summer, after attempting to dig up the roots, I'd be killing any new shoots as they popped up. The next year they still popped up but their were only a few shoots this time. My understanding is the root system stores energy for sending up new shoots. If the new shoots don't get the chance to grow, and send more energy down to the roots, then the plant eventually dies off at the roots. I'm not sure if the Round Up is able to go down to the roots and kill the entire network of roots. Maybe it kills some of the root system, and then what is left is able to send up more shoots. But if you keep at it, and keep on killing the ones that get sent up, then eventually you will starve off the ability of the roots to send up more shoots and they die off. .


Last edited by JoeT; 05-17-2008 at 01:50 PM.
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