Completely Backwards: Vermont Lilacs Blooming In October!

Lilacs bloom on the tree outside my house in 
St. Albans, Vermont this week. Stress from a
wet spring, a blight and drought have caused
this out of season display. 

You might have seen the following in your travels lately and said, what the hell?!?!?

Lilacs are blooming in Vermont. In October. 

Lilacs are of course a highly welcomed sight in May. What's not to love about them? When they bloom, they signal that you're in the heart of spring.

 They smell absolutely divine. And they're gorgeous. And traditional. I don't think I've ever seen an old farm house in Vermont without a lilac bush that's almost as old as the house. 

These lilac bushes usually cede beauty to the sugar maples in the autumn. While our hillsides glow orange and red and yellow, lilac bushes normally just drop their green leaves late in the autumn, and you're done until spring. Ho-hum.

This year, our lilac bushes were stressed by topsy turvy weather much more so than usual. Yes, we can blame climate change for another round of weather extremes in 2025.  

This year, we had an unusually wet, sopping spring. That encouraged a leaf blight to take hold in lilac leaves. That's a huge part of the reason why you saw so many lilac bushes with curled up, browning leaves that fell off prematurely. The blight - as you can imagine - stressed the lilac bushes. 

Then, the rain shut off in July, and we sank into our big flash drought. That stressed the lilac trees even more. 

"Stressful conditions put the plant in a dormant-like state and when the cooler temperatures and shorter days of fall arrive, some of the flower buds are triggered to bloom," Iowa State University Extension explains. 

We also finally got some rain in late September, which also might have helped trigger the odd new blooms.  

The good news is the blight, the drought and the weird October blooming won't kill or really harm your lilac bushes. These are really, really tough plants. Ever try to kill a lilac? It's almost impossible. Besides, why would anyone want to kill a lilac?

Next May, your suffering lilac will bloom beautifully, and on schedule. It might have fewer blooms than usual, because the tree put on some of its blooming effort this month. 

The strange doings with lilacs are a sign that weather extremes brought on by climate change are having an effect on everything.  In the springs of 2021 and 2023, for the first time in my life, I noticed freeze damage to lilac blooms.

In both those years, oddly warm early spring weather got trees leafing out and blooming way too early. Then snow and frost and deep freezes hit, turning some of those gorgeous lavender lilac blooms a disappointing brown. Or they didn't bloom at all in some cases.

Hopefully, normal amounts of precipitation will return soon. The drought here in Vermont and the rest of northern New England is still in full force. The latest weekly U.S. Drought reports comes out later this morning. I'll put up a post about that update here in this blog thingy later today. 

Maybe we'll get lucky and the weather during the spring and summer of 2026 will be pretty moderate to give all our garden plants a break. 

But give the climate change that everyone is experiencing, I'm sure something bizarro will happen next growing season, too.