When to Plant Achillea in Charleston, IL

One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Charleston it's a good idea to determine when you can plant achillea.

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Planting Calendar for Achillea

Frost tolerance for achillea: Very tolerant of frost.
When to plant: Up to 7 weeks before last frost.

You can plant achillea much earlier in the year because they do well in cold.

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

The earliest that you can plant achillea in Charleston is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant achillea and expect a good harvest is probably September. If you wait any later than that and your achillea may not have a chance to fully mature. Starting your achillea indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Charleston. You can expect an average low temperature of -10°F in the coldest months of winter.

It's important to remember that USDA zone info for Charleston is just an average and the actual date of last frost changes from year to year. Since half of the time in Charleston it frosts late in the year after April 15 be ready to protect your achillea if you have a surprise late frost.

USDA Zone Info for Charleston

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-10°F
Highest Expected Low-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Charleston

You may be interested in your other planting guides for Charleston.