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

By using the USDA zone info for Belle Fourche it's a good idea to determine when it's the best time to plant aubrieta.

Planting Calendar for Aubrieta

Frost tolerance for aubrieta:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant aubrieta a little earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant aubrieta in Belle Fourche 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 aubrieta and expect a good harvest is probably August. You probably don't want to wait any later than that or else your aubrieta may not have a chance to fully mature. Starting your aubrieta indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Belle Fourche. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Belle Fourche is just an average the actual date of last frost will vary from year to year. Since half of the time in Belle Fourche there is a last frost after May 15 be ready to cover your aubrieta in the event of a late frost.

USDA Zone Info for Belle Fourche

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 Belle Fourche

You may be interested in your other planting guides for Belle Fourche.