Knowledgebase

Lilac not thriving #751145

Asked May 20, 2021, 5:04 PM EDT

This spring, my lilac is just barely leafing out or flowering as it always has done. We've been having freezing days in late spring and early fall - that's the only reason I can think of. I'm not sure what to do at this point. Wait and see if it recovers on it's own? Prune it (how?). Cut it back to 6 - 12 inches? Replace it? Thanks for any suggestions.

Boulder County Colorado

Expert Response

Hi Dan,

Thank you for your inquiry.  You may have answered your own question ... the drastic changes in temperatures we've experienced this past winter and spring and the abrupt freeze/thaw conditions have played havoc with tender buds and the growth process. We probably will have to wait to see what happens, whether some or all of the plant is affected.  I wouldn't do anything drastic ... pruning now will not stimulate growth and may cause more stress to the plant. It seems many trees and shrubs are taking a bit more time to leaf out this year. We gardeners may have to practice that most difficult task: showing patience!  In the meantime, continue your regular watering/feeding/maintenance schedule. Good luck with your garden.

Jan, CMG Desk   

An Ask Extension Expert Replied May 21, 2021, 12:27 PM EDT
Thanks for your suggestions  on the lilac. Are you saying wait until next spring?

Also, I have a similar problem with a Hancock Coralberry. A few stems have leafed out, but at least 90% of the stems are still bare.

I think these plants can be pruned to the ground. Would you recommend that? If so, now or next spring? Also, if now, would I leave the few stems that are leafed out?

Dan



On May 21, 2021, at 10:27 AM, Ask Extension <<personal data hidden>> wrote:

The Question Asker Replied May 29, 2021, 8:03 PM EDT

Hi Dan,

It may take a while longer for you to see buds on your lilac and Hancock Coralberry than you normally would after extreme temperature changes. Although they may appear to be dead, they are most likely not -- it just takes time for them to recuperate. 

It's best to take a wait and see approach before pruning, especially this early. It could take several months before you can determine the full extent of the damage. 

Only then should you begin removing dead wood. Here is a link to information about pruning:

https://planttalk.colostate.edu/topics/trees-shrubs-vines/1713-pruning-shrubs/

Please don't hesitate to contact us again if you have any questions.

Thank you.

Patty, CMG

An Ask Extension Expert Replied June 02, 2021, 12:20 PM EDT

Loading ...