The Blazing Star (Liatris) is a tough-as-nails perennial that bounces back every year all on its own. Since it’s naturally cold-hardy, you can usually leave it right in the garden year-round without a second thought. However, if you’re growing yours in pots, there are a few extra steps you’ll want to take.
Blazing Star in the Winter
Because the Blazing Star is a perennial, it has a predictable yearly cycle. In the fall, all the growth above ground will die back completely. Don’t worry, though—the hardy rhizomes and roots are tucked away safely underground, where they can handle freezing temperatures like a pro.
Overwintering in the Garden
If your Blazing Stars are planted directly in the ground, they’re perfectly fine staying outdoors all year long. Even when the thermometer dips into the double digits below zero, those healthy roots stay safe. You won’t even need to provide any extra mulch or protection.
Overwintering Potted Plants
It’s a slightly different story for plants in pots or window boxes. Because there’s less soil to act as insulation, the roots are more vulnerable to deep freezes. In smaller containers, the soil can freeze solid, which cuts off the plant’s access to water and nutrients—or worse, causes permanent frost damage to the roots.
Generally, you don’t need to bring your pots inside to a garage or shed; they can stay outside. But you should give them a little “winter coat.” Try placing the pots on an insulating base like wood or Styrofoam to keep the ground chill away, and wrap the container itself in burlap, winter fleece, or even bubble wrap.
Winter Care Tips
One thing many gardeners forget: you still need to water your Blazing Stars occasionally during the winter to keep them from drying out. Just be careful not to overdo it—standing water (soggy feet) is just as dangerous as drought. This goes for both garden plants and potted ones. Finding that “just right” balance of moisture is key to a healthy plant come spring.
Preparing Your Blazing Stars for Winter
As the days get shorter, the Blazing Star enters a sort of “power-save mode,” focusing all its energy on the roots so it can burst back to life in the spring.
Stop Fertilizing
To help the plant settle into dormancy and prevent it from trying to grow tender new shoots too late in the season, you should stop fertilizing by August.
Pruning Back
For a clean, tidy look in your garden, you can cut back the withered stems and leaves before winter hits. However, if you’re a fan of the natural look (or want to leave some cover for beneficial insects), this step is totally optional!
