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

You can determine when it's possible to plant runner beans in Sunnyvale 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.

Since runner beans do not do well in cold weather it's necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant runner beans in Sunnyvale 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 fully mature. Starting your runner beans indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Sunnyvale. You should expect an average low temperature of 25°F in the coldest months of winter.

Remember that USDA zone info for Sunnyvale may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Sunnyvale it frosts late in the year after February 15 be ready to cover your runner beans in the event of one of those late frosts.

USDA Zone Info for Sunnyvale

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 Sunnyvale

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