I’m new to hollyhock planting, and from seed I got a 16 foot tall plant! Had no idea they grew that tall. Should I cut it back,
and will that kill it? The plant is up to my neighbor's roof now, and has a very thick stem. I don't want to kill it, but would like to cut it back. I live in a very hot climate. Can I propagate it by planting a small cut section of it? The plant threw out what I called "babies" and I planted them. They have three different colors of flowers: mother-pink; babies red, white, and pink. Is this usual?? I have photos but don't know how to upload a picture. Any advice would be helpful. Than you.
Certified GKH Gardening Expert
It is important, here, to understand the life cycle of these plants. They are biennials, meaning the first year will focus on leaf growth, and the second year will be flowering and seeding.
Pruning them at any time will disturb the natural cycle of the plant. The height is controlled, mostly, by genetics, but they can get slightly taller when there is not quite enough light. I would not recommend pruning, unless you are removing dead flowers, which can give you a little extra life from the plant if you are in a warmer climate.