When can I plant Romaine lettuce in Zone 1a

Before planting it is a good idea to find our USDA Zone info to figure out our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

It's possible to estimate when to plant romaine lettuce by checking out the USDA zone info for Zone 1a.


Planting Calendar for Romaine lettuce

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

You can plant romaine lettuce quite a bit earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

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

The earliest that you can plant romaine lettuce in Zone 1a is May. However, you really should wait until June 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 July. 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. Starting your romaine lettuce indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on June 15 in Zone 1a. We can expect an average low temperature of -60°F in the coldest months of winter.

It's important to remember that our actual date of last frost is just an average because it is based on the USDA zone info for Zone 1a and it is different every year. Since half of the time in Zone 1a we get surprised by a frost after June 15 be ready to protect your romaine lettuce if we have a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.