Likewise, how often do you need to fertilize wisteria?
When to Feed Most soil amendments and fertilizerfeedingshould take place in the spring. When firstplantingwisteria, lightly fertilize about four to sixweeksafter planting in spring or summer. In following years,whenthe wisteria is well-established,fertilize in earlyspring and again inmidsummer.
Correspondingly, how long do wisteria flowers last?
Wisteria blooms from early to mid-spring--typically three to four weeks, depending on the variety.Theblooms of Japanese wisteria open slowly, from toptobottom, and bloom longer than Chinesewisteria.
The most likely reason your wisteria won'tbloomis due to too much nitrogen. When a wisteriaplanthas too much nitrogen, it will have plenty offoliagegrowth, but very little and maybe no blooms. Anotherreasonfor wisteria blooming problems is theenvironmentthey are growing in.