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.

You should be able to determine when it's a good idea to plant brunfelsia by reviewing the USDA zone info for Columbia Falls.

Planting Calendar for Brunfelsia

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

Brunfelsia require warm weather which means that you have to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant brunfelsia in Columbia Falls is April. However, you really should wait until May 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. Any later than that and your brunfelsia may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your brunfelsia indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Columbia Falls. In the coldest months of winter you can expect an average low temperature of -20°F.

Since the USDA zone info for Columbia Falls is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Columbia Falls last frost occurs after April 15 be ready to protect your brunfelsia if you have a late frost.

USDA Zone Info for Columbia Falls

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Columbia Falls

You may be interested in your other planting guides for Columbia Falls.