I've got a number of delphiniums being potted on at the moment, but how big do they need to be before being put out, so they don't become food fodder for my many slugs and snails. Thanks.
I no longer grow them because they're slug fodder here, but I'd wait until they're filling a 6 or 7 inch pot at least. That way, no matter what the conditions, they'll be sturdier.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
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I live in west central Scotland - not where that photo is...