One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant string beans in Los Altos should be determined by referring to the USDA zone info.

Planting Calendar for String beans

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

Since string beans are not cold tolerant you really should wait until after the last frost has passed before you can plant them.

The earliest that you can plant string beans in Los Altos 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. You probably don't want to wait any later than that or else your string beans may not have a chance to fully mature. You can get started a little bit earlier by starting your string beans indoors.

Last Frost Date

The average date of last frost is February 15 in Los Altos. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for Los Altos is just an average and the actual date of last frost changes from year to year. Since half of the time in Los Altos it frosts late in the year after February 15 be ready to cover your string beans in the event of one of those late frosts.

USDA Zone Info for Los Altos

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°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 30°F.

Plants to Grow in Los Altos

You may be interested in your other planting guides for Los Altos.