My American Wisteria is growing up a pergola. It is 3years old. It has a bunch of vines winding up the pergola - not one big thick one as I see in pictures. What should I do?
American Wisteria Pruning
Certified GKH Gardening Expert
These take very long time to get that big. You can't really help it out much, other than giving it proper care until it reaches maturity.
This article will refresh you on the care of this: https://www.gardeningknowhow.com/ornamental/vines/wisteria/growing-wisteria-proper-wisteria-vine-care.htm