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

The USDA zone info for Kirkland should be reviewed to determine when it's the best time to plant napa valley fern.

Planting Calendar for Napa Valley Fern

Frost tolerance for napa valley fern:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You can not plant napa valley fern until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant napa valley fern in Kirkland 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 napa valley fern and expect a good harvest is probably August. You probably don't want to wait any later than that or else your napa valley fern may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your napa valley fern indoors.

Last Frost Date

On average the last frost is on March 15 in Kirkland. In the coldest months of winter you should expect an average low temperature of 15°F.

Just be sure to remember that USDA zone info for Kirkland is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Kirkland you get surprised by a frost after March 15 so make sure that you are ready to protect your napa valley fern in the event of a 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.