The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Los Altos you can figure out when it's the best time to plant runner beans by checking out the USDA zone info.

Planting Calendar for Runner beans

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

It's a bad idea to plant runner beans until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant runner 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 runner beans and expect a good harvest is probably September. You probably don't want to wait any later than that or else your runner beans may not have a chance to grow to maturity. Starting your runner beans indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is February 15 in Los Altos. In the coldest months of winter you should expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for Los Altos is an average and the actual date of last frost changes from year to year. Half of the time in Los Altos you get surprised by a frost after February 15 so make sure that you are ready to protect your runner beans in the event of a late frost.

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.