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.

A way of estimating when it's a good idea to plant asparagus lettuce is to examine the USDA zone info for Barstow.

Planting Calendar for Asparagus lettuce

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

Since asparagus lettuce require warm weather you have to wait until after the last frost has passed before you can plant them.

The earliest that you can plant asparagus lettuce in Barstow is March. However, you really should wait until April 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 September. If you wait any later than that and 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

In Barstow the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 20°F.

Keep in mind that USDA zone info for Barstow is an average and the actual date of last frost changes from year to year. Half of the time in Barstow you get surprised by a frost after February 15 so make sure that you are prepared to cover your asparagus lettuce if you have a late frost.

USDA Zone Info for Barstow

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

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

Plants to Grow in Barstow

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