Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can figure out when it's the best time to plant streptocarpella in Winthrop Harbor by checking out the USDA zone info.

Planting Calendar for Streptocarpella

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

It's a bad idea to plant streptocarpella until after all chance of frost has passed because they require warm weather.

The earliest that you can plant streptocarpella in Winthrop Harbor 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 grow to maturity. Starting your streptocarpella indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Winthrop Harbor. In the coldest months of winter you should expect an average low temperature of -15°F.

Remember that USDA zone info for Winthrop Harbor may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Winthrop Harbor last frost occurs after April 15 so be sure to be ready to cover your streptocarpella in the event of one of those late frosts.

USDA Zone Info for Winthrop Harbor

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 Winthrop Harbor

You may be interested in your other planting guides for Winthrop Harbor.