RECONSIDER: Re: Oh - and for slugs - wrap copper wire around the pot -- they can't cross copper
I’m dedicating this to those who are searching the internet for slug solutions (I'm weary of suppliers who don't know what they're doing taking people's money... verges on fraud, except they probably never gardened seriously in their lives and don't know any better.)
NOT tarnished copper...
I was intrigued about slugs and copper, so conducted my own little experiment. I put 1/2" copper pipe in the sun, and a slug so that, with the sun at his back, in his retreat he would be forced to come face-to-face with the copper. He touched it and reared back like a miniature horse! It worked, and I read later that their reaction is caused by a small electrical charge.
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One drawback about copper I've never seen addressed in forums or blogs, on garden sites, or by garden suppliers: once the copper is tarnished, slugs cross it like it's nothing.
I don't feel like cleaning my copper, nor wish to rebuy every season, so I've opted for ducks. They're fun companions (in the country), but the hens can be loud. Better to have a drake in town, if slugs are a problem there.
A note on leopard slugs: the ducks won't eat the larger ones in the evening and not at all when they're too big. Watching them, it seems they taste bad, so much exude some substance for protection.
God bless your Garden
--CharlysGardenPlace