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Slugs and snails love my potatoes too :-( I'm assuming that the nematodes reduced slug activity but snails seem relentless.
And I'm now seeing lots of weeds trying to grow in my raised bed compost. Looks like something that needs permanent attention with the hoe.
Thanks for the cable tie suggestion, they may be tighter gripping than the gardening ties, but I'm still concerned about slippage, so suspect I'll try sticky tape first.