The USDA Zone info is a great tool for gardeners to help us figure out your gardening 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 Douglas should be used to determine when you can plant chrysocephalum.

Planting Calendar for Chrysocephalum

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

Since chrysocephalum require warm weather it is important to wait until after the last frost before you can plant them.

The earliest that you can plant chrysocephalum in Douglas is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant chrysocephalum and expect a good harvest is probably August. Any later than that and your chrysocephalum may not have a chance to fully mature. Starting your chrysocephalum indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Douglas the average date of last frost happens on March 15. You can expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Douglas is an average and the actual date of last frost will vary from year to year. Half of the time in Douglas you get surprised by a frost after March 15 so be sure to be ready to cover your chrysocephalum if you have one of those late frosts.

USDA Zone Info for Douglas

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Douglas

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