Before planting it is a good idea to find your USDA Zone info to determine 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.

It's possible to determine when it's the best time to plant runner beans by looking at the USDA zone info for La Mesa.

Planting Calendar for Runner beans

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

Since runner beans are not cold tolerant you have to wait until after the last frost before you can plant them.

The earliest that you can plant runner beans in La Mesa 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. Starting your runner beans indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is January 31 in La Mesa. In the coldest months of winter you can expect an average low temperature of 30°F.

Remember that USDA zone info for La Mesa is not always accurate and the actual date of last frost changes from year to year. Since half of the time in La Mesa you get surprised by a frost after January 31 be ready to protect your runner beans in the event of a late frost.

USDA Zone Info for La Mesa

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in La Mesa

You may be interested in your other planting guides for La Mesa.