I have what I think is a hollyhock, but it has never bloomed. I had it about 3 yrs. It's huge, over 12 ft tall, beautiful soft foliage, but no blooms. Got any suggestions?
Certified GKH Gardening Expert
It may be lacking phosphorus. I would give the plants some phosphorus, like bone meal. If the foliage looks healthy but there are no blooms, phosphorus is normally the problem. This article should also help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm