Vines and Climbers: My Ch. wisteria's leaves are turning red, but seem healthy., 1 by Clare_CA

Clare_CA wrote:
Sure, Marilyn. I'm a little surprised that your nursery didn't know that this is normal new growth, but I guess I shouldn't be surprised because I find that most nursery people I run into don't know much about plants at all.

You should never have to fertilize a wisteria. The roots have small black nodules, which are nitrogen-fixing nodules. The new growth color seems to be red in the spring, turning green in the summer and yellow in the fall before finally shedding altogether.