The ones I have planted in the ground are on their own. I plant deep so they either survive or I don't need them. I spent many years mulching and winter protecting but I can no longer do all that so only the survivors stay now. The potted ones are enough of a chore, lol! Those are placed all together along the back southern exposure of my house. They are wrapped in burlap and packed with leaves. We usually do this right after Thanksgiving. Most years, depending on the weather of course, we take them out of winter storage around April 1st.
