Hi, I have some pruned late summer raspberry canes (about 6 inches from the ground) in a bed of buttercup weeds. I’d like to give them the classic treatment of 6 inches of compost and black plastic for a few months. my question is whether this will damage the pruned canes i.e rotting them or slowing their growth
I guess you mean autumn raspberries and I would cover the bed now, but compost only, then as both the raspberries and (weakened) buttercups push though, pull the latter at least weekly through spring, and by July it should be all gone if you have been thorough