When can I plant Watermelon in Zone 6b

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

By using the USDA zone info for Zone 6b it's a good idea to estimate when it's the best time to plant watermelon.


Planting Calendar for Watermelon

Frost tolerance for watermelon: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Watermelon do not do well in cold weather which means that it's necessary to wait until it warms up after the last frost has passed before you can plant them.

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

The earliest that you can plant watermelon in Zone 6b 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 watermelon and expect a good harvest is probably August. You probably don't want to wait any later than that or else your watermelon may not have a chance to fully mature. You can get started a few weeks earlier by starting your watermelon indoors.

Last Frost Date

The average date of last frost is April 15 in Zone 6b. We can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Zone 6b is just an average our actual date of last frost can change quite a bit from year to year. Since half of the time in Zone 6b we get surprised by a frost after April 15 be ready to protect your watermelon if we have one of those late frosts.

USDA Zone Info for Zone 6b

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 Zone 6b

You may be interested in our other planting guides for Zone 6b.