One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In San Bruno you can determine when it's a good idea to plant cuphea by reviewing the USDA zone info.

Planting Calendar for Cuphea

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

Cuphea do not do well in cold weather which means that you have to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant cuphea in San Bruno 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 cuphea and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cuphea may not have a chance to grow to maturity. If you are starting your cuphea indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in San Bruno. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for San Bruno is just an average the actual date of last frost is different every year. Since half of the time in San Bruno last frost occurs after January 31 be ready to protect your cuphea in the event of one of those late frosts.

USDA Zone Info for San Bruno

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 San Bruno

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