The astilbe is a strong flowering perennial that is native to Asia and North America. It does well in USDA zones that range between 3 and 9. Because of this, the astilbe can definitely survive winter, even during harsh temperatures and weather. If you make note of the following steps, you should have no problem keeping your astilbe alive and healthy.
Protecting Astilbe in Winter
Because of this herbaceous perennial’s toughness, you won’t need to worry about protecting it during winter. You won’t need to cover your plant. A bit of snowfall will also not damage your perennial, so you can confidently leave your astilbe as is. You may notice, however, that your astilbe may appear a bit lifeless, but this is normal as these plants die down during the fall and regrow back in spring.
Cutting Back Astilbe For Winter
It is essential that you cut back your astilbe as they will become dormant during the winter. A good rule of thumb would be to cut off all of your plant’s foliage and leave about 3 inches of stem above the soil. Doing so will make it much easier for you to care for your astilbe during this time.
Astilbe Winter Care in Pots
If your astilbe is in a pot or you plan on moving it to a pot, make sure to put them in an area that is on the cooler side. Ideally, the area should be dark and with screening as this will help to protect your perennial from any potential rodent damage. If you are planning to move your potted astilbe into the garden after winter passes, be sure to do so in early spring after the frost danger is over.
Watering Astilbe in Winter
Remember, astilbe plants need moist soil in order to thrive. You should focus on watering generously until the ground freezes. A way to help lock in the moisture is to utilize mulch. You can put 2 inches worth of mulch around your plant to keep the temperature regulated. This will also help maintain your soil’s overall moisture level. If need be, you can water your astilbe if there is no snow and if the temperature is above 40 degrees Fahrenheit. Only do this if necessary. Check the moisture at least once per month, whether it is potted or planted in the ground.
Growing Astilbe Indoors
If you are interested in bringing your astilbe inside for the winter, you definitely can. Your perennial will stay dormant until the springtime arrives.
Steps To Care For Astilbe in Winter
As previously mentioned, if you live in a growing zone ranging between 3 and 9, your plant will do just fine during the cold months. Don’t worry about covering your astilbe and don’t panic if it gets hit by a bit of snowfall. Just make sure to water thoroughly before the first frost.
Step 1 - cut back your astilbe and leave 3-inch stems behind.
Step 2 - water generously before the first frost and use a mulch to lock in moisture.
Step 3 - keep an eye on the soil, and only water if absolutely necessary.
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Author Chris Link - Published 07-06-2022