The USDA Zone info is a great tool for gardeners to help us determine 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 Kirkland can be reviewed to estimate when it's a good idea to plant gayfeather.

Planting Calendar for Gayfeather

Frost tolerance for gayfeather:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Gayfeather can survive in quite a bit of cold which means that you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant gayfeather in Kirkland 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 gayfeather and expect a good harvest is probably September. You probably don't want to wait any later than that or else your gayfeather may not have a chance to grow to maturity. Starting your gayfeather indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is March 15 in Kirkland. You should expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Kirkland 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 Kirkland it frosts late in the year after March 15 so make sure that you are prepared to protect your gayfeather if you have a surprise late frost.

USDA Zone Info for Kirkland

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 Kirkland

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