Before planting it is a good idea to find your USDA Zone info to figure out 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.

By checking out the USDA zone info for Key Biscayne you will be able to estimate when you can plant watermelon.

Planting Calendar for Watermelon

Frost tolerance for watermelon:	Not tolerant of frost.
When to plant:	After the last frost.

Watermelon require warm weather which means that it is necessary to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant watermelon in Key Biscayne is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant watermelon and expect a good harvest is probably November. You probably don't want to wait any later than that or else your watermelon may not have a chance to really do well. If you are starting your watermelon indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Key Biscayne it never frosts. You should expect an average low temperature of 40°F in the coldest months of winter.

Since the USDA zone info for Key Biscayne is just an average the actual date of last frost will vary from year to year. Since it never frosts in Key Biscayne you do not have to be ready to protect your watermelon if you have a late frost.

USDA Zone Info for Key Biscayne

Here is the info for USDA Zone 11a.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	40°F
Highest Expected Low	45°F

This means that on a really cold year, the coldest it will get is 40°F. On most years you should be prepared to experience lows near 45°F.

Plants to Grow in Key Biscayne

You may be interested in your other planting guides for Key Biscayne.