The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You will be able to determine when you can plant napa valley fern by reviewing the USDA zone info for Phoenix.

Planting Calendar for Napa Valley Fern

Frost tolerance for napa valley fern:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant napa valley fern until after all chance of frost has passed because they do not do well in cold weather.

The earliest that you can plant napa valley fern in Phoenix 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. If you wait any later than that and your napa valley fern may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your napa valley fern indoors.

Last Frost Date

The average date of last frost is February 15 in Phoenix. In the coldest months of winter you can expect an average low temperature of 25°F.

Always keep in mind that USDA zone info for Phoenix is just an average and the actual date of last frost will vary from year to year. Half of the time in Phoenix you get a frost after February 15 so make sure that you are prepared to cover your napa valley fern in the event of one of those late frosts.

USDA Zone Info for Phoenix

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 Phoenix

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