One of the first steps you take when you are making a decision about 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.

The first chance to plant asparagus lettuce in Pullman should be figured out by reviewing the USDA zone info.

Planting Calendar for Asparagus lettuce

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

You should not plant asparagus lettuce until after the last frost when the weather gets warmer because they are not cold tolerant.

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

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Pullman. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Pullman is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Pullman there is a last frost after April 15 so make sure that you are prepared to cover your asparagus lettuce in the event of one of those late frosts.

USDA Zone Info for Pullman

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 Pullman

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