Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant romaine lettuce in Key Biscayne should be determined by looking at the USDA zone info.

Planting Calendar for Romaine lettuce

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

Romaine lettuce can survive in a bit of cold which tells us that you can plant them much earlier in the year than more sensitive plants.

The earliest that you can plant romaine lettuce 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 romaine lettuce and expect a good harvest is probably November. You probably don't want to wait any later than that or else your romaine lettuce may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your romaine lettuce indoors.

Last Frost Date

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

It's important to remember that USDA zone info for Key Biscayne is just an average and the actual date of last frost changes from year to year. Since it never frosts in Key Biscayne you do not have to be ready to protect your romaine lettuce in the event of a surprise 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.