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24-11-2010, 01:56 PM
posted to uk.rec.gardening
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Caffeine versus slugs & snails
On Nov 24, 12:30*pm, Martin Brown
wrote: On 24/11/2010 10:57, Janet wrote: In , says... I doubt it will last all summer (though it might in a greenhouse) as caffeine is pretty water soluble and will migrate into the ground. Use the coffee grounds directly on the soil and you might have a useful effect. I have tried it and cannot decide if it works or not. * *IME certain textures, such as sand, fine grit, wood ashes, and rough leaves like comfrey and dried bracken, do have *some protective deterrent/ repellent effect as slugs don't like crossing them; maybe coffee grounds work that way. Wood ashes are pretty alkaline. Charcoal and the last bits of coke coal seem to work for a while as slug deterrents. They don't like the rough surface. But I think the coffee grounds effect is mainly chemical. Regards, Martin Brown Now if coffee would work on Vine weevil |
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