I just planted my 3 eggplant seedlings yesterday and I usually have flea beetle problems on them so I saved some coffee grounds and will be spreading them today.
I tried this 2 years ago and it seemed to work. I sprinkled the grounds all over the plants and the soil around them. I will know in a day or two if it is working because the flea beetles ALWAYS find my eggplants. If this does not work my second plan is to sprinkle them with DE dust and see if that works.
I have never had them bother any crops other than eggplant.
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