One of the first steps you take when you are making a decision about 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.

A way of figuring out when it's the best time to plant brunfelsia is to look at the USDA zone info for Island Lake.

Planting Calendar for Brunfelsia

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

Brunfelsia require warm weather which tells us that you really should wait until it warms up after the last frost before you can plant them.

The earliest that you can plant brunfelsia in Island Lake 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 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 April 15 in Island Lake. In the coldest months of winter you should expect an average low temperature of -15°F.

Just be sure to remember that USDA zone info for Island Lake is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Island Lake there is a last frost after April 15 be ready to protect your brunfelsia in the event of one of those late frosts.

USDA Zone Info for Island Lake

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Island Lake

You may be interested in your other planting guides for Island Lake.