One of the best tools that you have as gardeners to help us figure out 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 looking at the USDA zone info for International Falls you should be able to estimate when it's the best time to plant brunfelsia.

Planting Calendar for Brunfelsia

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

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

The earliest that you can plant brunfelsia in International Falls 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. Any later than that and your brunfelsia may not have a chance to really do well. You can get started a few weeks earlier by starting your brunfelsia indoors.

Last Frost Date

The average date of last frost is May 15 in International Falls. It might get as low as -40°F during the coldest months of winter.

It's important to remember that USDA zone info for International Falls is an average and the actual date of last frost is different every year. Since half of the time in International Falls you get a frost after May 15 be ready to cover your brunfelsia if you have a late frost.

USDA Zone Info for International Falls

Here is the info for USDA Zone 3a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-40°F
Highest Expected Low	-35°F

This means that on a really cold year, the coldest it will get is -40°F. On most years you should be prepared to experience lows near -35°F.

Plants to Grow in International Falls

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