One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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 Barstow you can estimate when to plant string beans by looking at the USDA zone info.

Planting Calendar for String beans

Frost tolerance for string beans:	Not tolerant of frost.
When to plant:	After the last frost has passed.

String beans do not do well in cold weather which tells us that you need to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant string beans 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 string beans and expect a good harvest is probably September. Any later than that and your string beans may not have a chance to fully mature. You can get started a few weeks earlier by starting your string beans indoors.

Last Frost Date

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

It's important to remember that USDA zone info for Barstow is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Barstow it frosts late in the year after February 15 so make sure that you are prepared to cover your string beans in the event of 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.