When can I plant Astilbe in Zone 7a

Before planting it is a good idea to find our USDA Zone info to determine our garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

You should be able to determine when it's a good idea to plant astilbe by referring to the USDA zone info for Zone 7a.


Planting Calendar for Astilbe

Frost tolerance for astilbe: Tolerant of a very small amount of frost.
When you should plant them: Up to 3 weeks before last frost.

Astilbe are barely cold tolerant which means that you can plant them slightly earlier than other plants that might not handle the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant astilbe
Possibly ok, but a risky time to plant astilbe
Probably not a good time to plant astilbe

The earliest that you can plant astilbe in Zone 7a is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant astilbe and expect a good harvest is probably August. Any later than that and your astilbe may not have a chance to grow to maturity. You can get started a little bit earlier by starting your astilbe indoors.

Last Frost Date

The average date of last frost is April 15 in Zone 7a. In the coldest months of winter we should expect an average low temperature of 0°F.

It's important to remember that our actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 7a and it can change quite a bit from year to year. Half of the time in Zone 7a last frost occurs after April 15 so just be sure to be ready to cover your astilbe if we have one of those late frosts.

USDA Zone Info for Zone 7a

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low0°F
Highest Expected Low5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Zone 7a

You may be interested in our other planting guides for Zone 7a.