Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when it's a good idea to plant runner beans is to look at the USDA zone info for San Diego.

Planting Calendar for Runner beans

Frost tolerance for runner beans:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since runner beans require warm weather it's important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant runner beans in San Diego is February. However, you really should wait until March 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. Any later than that and your runner beans may not have a chance to really do well. You can get started a little bit earlier by starting your runner beans indoors.

Last Frost Date

On average the last frost is on January 31 in San Diego. In the coldest months of winter you should expect an average low temperature of 35°F.

Always keep in mind that USDA zone info for San Diego is not always accurate and the actual date of last frost will vary from year to year. Half of the time in San Diego there is a last frost after January 31 so make sure that you are ready to protect your runner beans in the event of a late frost.

USDA Zone Info for San Diego

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in San Diego

You may be interested in your other planting guides for San Diego.