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.

The USDA zone info for South San Francisco should be reffered to in order to figure out when it's a good idea to plant cleome.

Planting Calendar for Cleome

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

It's probably a bad idea to plant cleome until after the last frost has passed because they are not cold tolerant.

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

Last Frost Date

On average the last frost has passed is on January 31 in South San Francisco. In the coldest months of winter you should expect an average low temperature of 30°F.

Always keep in mind that USDA zone info for South San Francisco is just an average and the actual date of last frost changes from year to year. Half of the time in South San Francisco you get surprised by a frost after January 31 so make sure that you are ready to protect your cleome in the event of a surprise late frost.

USDA Zone Info for South San Francisco

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 South San Francisco

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