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

In Green River you can determine when it's possible to plant asparagus lettuce by using the USDA zone info.

Planting Calendar for Asparagus lettuce

Frost tolerance for asparagus lettuce:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since asparagus lettuce are not cold tolerant you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant asparagus lettuce in Green River 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 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 grow to maturity. If you are starting your asparagus lettuce indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Green River the average date of last frost happens on May 15. In the coldest months of winter you should expect an average low temperature of -25°F.

Keep in mind that USDA zone info for Green River is an average and the actual date of last frost is different every year. Half of the time in Green River it frosts late in the year after May 15 so be sure to be ready to cover your asparagus lettuce if you have a late frost.

USDA Zone Info for Green River

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Green River

You may be interested in your other planting guides for Green River.