One of the first steps you take when you are getting a good idea 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.

In Cincinnati you can estimate when you can plant romaine lettuce by referring to 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.

Since romaine lettuce are very cold tolerant you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant romaine lettuce in Cincinnati is February. However, you really should wait until March 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 September. You probably don't want to wait any later than that or else your romaine lettuce may not have a chance to really do well. You can get started a couple of weeks earlier by starting your romaine lettuce indoors.

Last Frost Date

The average date of last frost is April 15 in Cincinnati. You should expect an average low temperature of -5°F in the coldest months of winter.

Remember that USDA zone info for Cincinnati is an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Cincinnati it frosts late in the year after April 15 be ready to protect your romaine lettuce if you have one of those late frosts.

USDA Zone Info for Cincinnati

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 Low	0°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 Cincinnati

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