One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Larkspur you can estimate when to plant napa valley fern by reviewing the USDA zone info.

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.

It's probably a bad idea to plant napa valley fern until after the last frost because they are not cold tolerant.

The earliest that you can plant napa valley fern in Larkspur is March. However, you really should wait until April 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 September. You probably don't want to wait any later than that or else your napa valley fern may not have a chance to fully mature. Starting your napa valley fern indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on February 15 in Larkspur. It might get as low as 25°F during the coldest months of winter.

It's important to remember that USDA zone info for Larkspur may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Larkspur you get surprised by a frost after February 15 be ready to protect your napa valley fern if you have a surprise late frost.

USDA Zone Info for Larkspur

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Larkspur

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