One of the best tools that you have as gardeners to help us determine 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.

It's a good idea to figure out when to plant chrysocephalum by using the USDA zone info for Imperial.

Planting Calendar for Chrysocephalum

Frost tolerance for chrysocephalum:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant chrysocephalum until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant chrysocephalum in Imperial 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 chrysocephalum and expect a good harvest is probably September. If you wait any later than that and your chrysocephalum may not have a chance to fully mature. You can get started a little bit earlier by starting your chrysocephalum indoors.

Last Frost Date

The average date of last frost is January 31 in Imperial. It might get as low as 30°F during the coldest months of winter.

Keep in mind that USDA zone info for Imperial is an average and the actual date of last frost is different every year. Half of the time in Imperial last frost occurs after January 31 so always be ready to protect your chrysocephalum in the event of a surprise late frost.

USDA Zone Info for Imperial

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 Imperial

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