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.

It's possible to estimate when you can plant streptocarpella by looking at the USDA zone info for Northbrook.

Planting Calendar for Streptocarpella

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

Since streptocarpella are not cold tolerant it is important to wait until after the last frost before you can plant them.

The earliest that you can plant streptocarpella in Northbrook 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 streptocarpella and expect a good harvest is probably August. You probably don't want to wait any later than that or else your streptocarpella may not have a chance to really do well. Starting your streptocarpella indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Northbrook. It might get as low as -15°F during the coldest months of winter.

Keep in mind that USDA zone info for Northbrook is an average and the actual date of last frost is different every year. Half of the time in Northbrook you get surprised by a frost after April 15 so make sure that you are prepared to protect your streptocarpella in the event of a late frost.

USDA Zone Info for Northbrook

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 Northbrook

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