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Wisterias blooming late #637467

Asked May 18, 2020, 3:45 PM EDT

Normally my wisterias are blooming at around this time.  This year nothing is showing (not even a single leave) so I am afraid they are gone. The old leaves from last year are not dropping completely (as shown in the picture on the right). The two wisteria trees are mature and have been there for over 10 years.  Is there anyhing I can do at this point?
The enclosed pictures are from May 2018 and May 2020.
Thanks,
Nga Hoang

Updated May 22:  The leaves started coming out yesterday.  So somehow they are really late this year. 

Adams County Colorado

Expert Response

Hello Nga:

Wisteria are so beautiful. Give it more time! Very slow Spring for all of our trees and large shrubs. Buds may have frozen during our last frost, but generally if this Wisteria has been blooming for years I would definitely not give up hope. Continue to water and take care of this plant as you have been, but if you do fertilize it go ahead and do it again once the leaves are totally back on the plant. The good news is that it will probably bloom next year, and you may get some bloom this year. The only link I can find on Wisteria is from another state university but hopefully this will help. Wisteria is not a common tree/vine in Colorado but obviously it is happy. Thank you for contacting us. https://extension.oregonstate.edu/news/wisteria-care-get-out-your-clippers-twice-year-go-town


Adams County Master Gardener Replied May 22, 2020, 1:44 PM EDT
Thank you for your reply.  You are correct, it's just slow this year.  In the last couple days, there were strong wind and it blew away all of the dead leaves from last year and I started seeing some new leaves.  I was so worry about them because it takes so long for wisterias to bloom in Colorado that I don't want to replace them.  I don't normally fertilize them but I probably will do this year and hope for a spectacular blooming next year.

Thanks again.
The Question Asker Replied May 22, 2020, 2:52 PM EDT
You are very welcome.  Please don't hesitate to contact us again if we can be of service.
Adams County Master Gardener Replied May 27, 2020, 12:13 PM EDT

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