When to Plant Cleome in Palmyra, PA

One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Palmyra should be used to figure out when it's the best time to plant cleome.


Planting Calendar for Cleome

Frost tolerance for cleome: Not tolerant of frost.
When to plant: After the last frost has passed.

Cleome require warm weather which means that you need to wait until it warms up after the last frost before you can plant them.

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

The earliest that you can plant cleome in Palmyra 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 cleome and expect a good harvest is probably August. Any later than that and your cleome may not have a chance to grow to maturity. If you are starting your cleome indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Palmyra is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Palmyra you get surprised by a frost after April 15 so make sure that you are ready to cover your cleome in the event of one of those late frosts.

USDA Zone Info for Palmyra

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 Palmyra

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