One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to figure out when it's the best time to plant snap beans by using the USDA zone info for Millbrae.

Planting Calendar for Snap beans

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

You really shouldn't plant snap beans until after the last frost because they require warm weather.

The earliest that you can plant snap beans in Millbrae 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 snap beans and expect a good harvest is probably September. Any later than that and your snap beans may not have a chance to grow to maturity. If you are starting your snap beans indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is January 31 in Millbrae. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Millbrae may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Millbrae it frosts late in the year after January 31 so be sure to be ready to protect your snap beans if you have a late frost.

USDA Zone Info for Millbrae

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 Millbrae

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