One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant cleome in Campbell can be determined by looking at the USDA zone info.

Planting Calendar for Cleome

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

Since cleome are not cold tolerant it is important to wait until after the last frost before you can plant them.

The earliest that you can plant cleome in Campbell is March. However, you really should wait until April 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. You probably don't want to wait any later than that or else your cleome may not have a chance to fully mature. 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 is on February 15 in Campbell. In the coldest months of winter you can expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for Campbell is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Campbell last frost occurs after February 15 be ready to protect your cleome if you have a surprise late frost.

USDA Zone Info for Campbell

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Campbell

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