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I have an allotment in England where I grow vegetables and fruit. One of the biggest problems I am having with it (other than the soil desperately needing fertilising) is the bindweed infestation.

By Anneli Salo (Own work (Own photo)) [CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

I have tried all sorts to get rid of it. I have tried digging the roots out by hand, but I have 150 sqr meters of ground to dig through & I have read that the roots can penetrate to a depth of 5m.

I have tried training it up bamboo away from my crops and spraying it with Glyphosate based weed killers.

All to no avail, it seems to come back within only a matter of a week or two.

I've looked around the internet for more answers, but can't seem to come up with anything.

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4 Answers 4

up vote 5 down vote accepted

Ooh, dear, sorry AvieRose, that's because there isn't a once and for all solution. Bindweed is practically impossible to eradicate, as you've discovered, so all you can hope for is to keep it in check. In light soils, it's often possible to extract the bulk of any root material when the area is unplanted, but in clay or heavy soils, it's much harder because, as you probably know, it will regrow from a piece of root no more than a quarter of an inch in size. I usually do what you did, insert canes and let it climb up that, then spray with glyphosate, and periodically, when revamping an area, attempt to extract as much of the root as is possible.

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Yes, I'm beginning to think thats the case. My soil is very heavy clay at the moment, I'm trying to break it up and add in some more nutritious soil but its a long old slogg! –  AvieRose Feb 13 '13 at 18:03
    
To add onto this, be most vigilant in your glysophate (RoundUp) spraying in the fall. This is when your Bindweed is pulling in the most nutrients for winter survival and will soak up the most poison. –  UtahJarhead Sep 17 '13 at 16:50

The only thing I want to add... You are fighting 2 battles, one against the plants, one against the seeds.

You must never let it seed, or your eradication will be delayed by years.

You should fight a pitched battle against a small area , maybe 20m by 10m for a year or 2, then advance.

For the plants in my area, the main problem is that are dormant while I am fighting weeds in the spring, then pop up when I am resting on my mid summer laurels.

I have heard rumors of putting the plant in a cup of glucophosphosphate, seems dangerous to me, but who knows.

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I would sink a plastic barrier to stop any more of that root getting on your patch, corrogated plastic as one can bend onto shape round a corner and about 18 inches or more deep, secondly i would put jam jars of concentrated weedkiller around the edge- but be carefull and break any incoming stems and shove them in the jars the ends should in theory suck up any killer and start to die off this should also stop any contamination of your crops and neighbouring soil

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An alternative approach that does not resort to herbicides would be to simply build the soil nutrition without tilling until it is no longer a good habitat for the opportunistic pioneer bindweed.

From Toby Hemenway's book Gaia's Garden:

Two or three seasons of tedious excavation of seemingly endless root networks didn't faze the morning glories (bindweed). Deep mulch, even heavy wood chips merely delayed their exuberant eruption into daylight and rapid smothering of anything else I planted. It was the closest I've come to considering herbicide. Then, one year, the morning glories were pale and patchy, and in two more years they were gone, even though I hardly weeded them. In the meantime, the soil in these beds had gone from red clay to luscious black loam after years of constant deep mulches.

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