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 looking at the USDA zone info for Billings you will be able to determine when it's a good idea to plant brunfelsia.

Planting Calendar for Brunfelsia

Frost tolerance for brunfelsia:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Brunfelsia do not do well in cold weather which tells us that you must wait until it warms up after the last frost before you can plant them.

The earliest that you can plant brunfelsia in Billings 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 brunfelsia and expect a good harvest is probably August. If you wait any later than that and your brunfelsia may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your brunfelsia indoors.

Last Frost Date

In Billings the average date of last frost happens on May 15. In the coldest months of winter you can expect an average low temperature of -25°F.

It's important to remember that USDA zone info for Billings is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Billings it frosts late in the year after May 15 be ready to cover your brunfelsia in the event of a late frost.

USDA Zone Info for Billings

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 Billings

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