One of the first steps you take when you are determining your gardening schedule is find your 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.

The USDA zone info for South Holland should be used to figure out when it's possible to plant streptocarpella.

Planting Calendar for Streptocarpella

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

It's probably a bad idea to plant streptocarpella until after the last frost has passed because they require warm weather.

The earliest that you can plant streptocarpella in South Holland 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. If you wait any later than that and your streptocarpella may not have a chance to really do well. Starting your streptocarpella indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on April 15 in South Holland. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for South Holland may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in South Holland you get surprised by a frost after April 15 so be sure to be ready to cover your streptocarpella in the event of a late frost.

USDA Zone Info for South Holland

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in South Holland

You may be interested in your other planting guides for South Holland.