Same thing happens. Burst of warming air in March, then thunderstorms and chilly air kill off first blooms.
Summer lilacs come in, lush and beautiful.

Looks like the temps won't be a problem (hovering right around freezing) but with everything starting to bloom and leaf out, if enough snow falls, we'll be looking at a lot of broken branches.

Lots or tree damage a few years back, and this could be a repeat.

On year, I went outside and it was eerily quiet... except for the periodic crack/woosh of a falling branch under the weight of the snow. It was scary and exciting all at once.

I lived just south of Dallas. One night we got 14 inches of snow. I had lived in a snowy place so I knew to knock the snow off the branches of the live oak tree in my yard. When I went outside I could hear branches breaking for blocks around. The next week or so most yards had big piles of branches in front for the city to pick up.

I've spent a lot of time in that state in all times of year, and it has the craziest, harshest, quick-changing-est weather I've ever experienced. It's nuts!

Inside the greenhouse…

55 with sun outside.

Hubby and I are hot house plants.

My grandmother had lilac bushes in her backyard. We always went in and out the side door and I remember so well the smell of lilacs wafting over whenever there was a slight breeze. It was heavenly!

But low 30s, and protected by a blanket of snow, could be survivable. We had snow on Mothers Day many years ago in Central MA and the lilac blossoms did fine - it made for some great photos of them against a white background. Good luck!

The jury is still out on one of my apple trees. It has already blossomed. I'm not sure if the tree will fruit after this quick chill. Sometimes the snow insulates sufficiently to protect the buds. Every year is a crap shoot.

The very best of the last 10-15 years? We enjoyed so many peaches and cherries... we didn't even mind sharing with the squirrels!

I recall last year or the year before it was 83 degrees in the afternoon one day in March and snowed overnight. It's unreal.

from "The Milagro Beanfield War." BTW, I'm in Colorado, too.

Thanks