One of the first steps you take when you are getting a good idea 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.

One way of figuring out when it's a good idea to plant chrysocephalum is to examine the USDA zone info for Ellensburg.

Planting Calendar for Chrysocephalum

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

Since chrysocephalum require warm weather you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant chrysocephalum in Ellensburg 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. If you wait any later than that and your chrysocephalum may not have a chance to really do well. You can get started a few weeks earlier by starting your chrysocephalum indoors.

Last Frost Date

The average date of last frost is April 15 in Ellensburg. You can expect an average low temperature of -5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Ellensburg may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Ellensburg you get surprised by a frost after April 15 so just be sure to be ready to cover your chrysocephalum if you have one of those late frosts.

USDA Zone Info for Ellensburg

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Ellensburg

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