One of the first steps you take when you are figuring out 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.

In Largo you can estimate when it's a good idea to plant napa valley fern by using the USDA zone info.

Planting Calendar for Napa Valley Fern

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

Since napa valley fern are not cold tolerant you really should wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant napa valley fern in Largo 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 napa valley fern and expect a good harvest is probably September. Any later than that and your napa valley fern may not have a chance to really do well. You can get started a few weeks earlier by starting your napa valley fern indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Largo. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Largo is just an average the actual date of last frost is different every year. Half of the time in Largo it frosts late in the year after January 31 so be sure to be ready to cover your napa valley fern if you have a late frost.

USDA Zone Info for Largo

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Largo

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