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

By referring to the USDA zone info for Luverne you should be able to figure out when it's a good idea 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 the last frost when the weather gets warmer.

Since napa valley fern do not do well in cold weather it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant napa valley fern in Luverne 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. Any later than that and your napa valley fern may not have a chance to really do well. 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 May 15 in Luverne. In the coldest months of winter you can expect an average low temperature of -25°F.

Since the USDA zone info for Luverne is just an average the actual date of last frost is different every year. Since half of the time in Luverne you get surprised by a frost after May 15 be ready to cover your napa valley fern if you have one of those late frosts.

USDA Zone Info for Luverne

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Luverne

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