I just moved to a new house and I have noticed a nice patch of columbines. I love columbines so I would love to have them back next spring. I live in Toronto (Zone 5-6).
I was wondering what should I do with them before winter. Should I cut them down to the ground or should I leave the foliage as it is? I know they strive in the wild so probably they don't need to be protected like roses. Are they perennials or do they just reseed? If they just reseed then I rather cut them right to the ground because they have leaf miners.