I am looking for suggestions on a low maintenance, raised garden boarder around my new concrete deck. My yard is full sun, zone 4, elevation is 2300 ft and we are on a snow belt so will likely need zone 3 plants. The bed is 18" wide. I would like some winter interest, and some height is necessary as we are not putting a railing on the deck. I'm not a gardener so low maintenance is preferred- trimming is fine, but weeding, splitting and other special care would preferably be avoided. Thank you!!
I would recommend some Double Knock Out rosebushes and perhaps some Watercolors Home Run rosebushes. Both are the new generation roses that will keep on blooming without deadheading them. Prune them a bit to shape them but pruning is to be kept to a minimum as pruning will likely reduce the amount of blooms. Just one suggestion.