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

A way of estimating when it's a good idea to plant napa valley fern is to examine the USDA zone info for Cloquet.

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.

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

The earliest that you can plant napa valley fern in Cloquet is May. However, you really should wait until June 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 fully mature. Starting your napa valley fern indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Cloquet. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Cloquet is an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Cloquet it frosts late in the year after May 15 be ready to cover your napa valley fern in the event of a late frost.

USDA Zone Info for Cloquet

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°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 -25°F.

Plants to Grow in Cloquet

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