When to Plant Calliopsis in West Chester, PA

Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first chance to plant calliopsis in West Chester can be estimated by referring to the USDA zone info.


Planting Calendar for Calliopsis

Frost tolerance for calliopsis: Not tolerant of frost.
When to plant: After all chance of frost has passed.

Calliopsis are not cold tolerant which means that it is necessary to wait until it warms up after the last frost before you can plant them.

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

The earliest that you can plant calliopsis in West Chester is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant calliopsis and expect a good harvest is probably August. You probably don't want to wait any later than that or else your calliopsis may not have a chance to grow to maturity. You can get started a little bit earlier by starting your calliopsis indoors.

Last Frost Date

On average the last frost has passed is on April 15 in West Chester. In the coldest months of winter you can expect an average low temperature of -5°F.

Since the USDA zone info for West Chester is not always accurate the actual date of last frost is different every year. Since half of the time in West Chester there is a last frost after April 15 be ready to protect your calliopsis in the event of a surprise late frost.

USDA Zone Info for West Chester

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

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

Plants to Grow in West Chester

You may be interested in your other planting guides for West Chester.