Q.Very tall Hollyhock
I understand that Hollyhock plants can grow to 70 or so inches tall. I have a white flowering Hollyhock that is approx 132 inches tall. Is this unusual.? Sorry I have no idea how one uploads a photo although I have one.
Certified GKH Gardening Expert
It is not unheard of. Sometimes this can be natural, but most of the time it happens from a lack of light. This can be noted by large gaps between flowers.
If the flower spike has little to no gap between flowers, then you may have a really healthy, tall specimen.
This article will give you more information on the Hollyhock: https://www.gardeningknowhow.com/ornamental/flowers/hollyhock/tips-on-hollyhocks-growing-hollyhocks-successfully.htm