One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Columbia should be used to estimate when it's possible to plant streptocarpella.

Planting Calendar for Streptocarpella

Frost tolerance for streptocarpella:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

It's not a good idea to plant streptocarpella until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant streptocarpella in Columbia 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. 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 few weeks earlier.

Last Frost Date

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

Just be sure to remember that USDA zone info for Columbia is just an average and the actual date of last frost is different every year. Half of the time in Columbia you get a frost after April 15 so be sure to be ready to protect your streptocarpella in the event of a late frost.

USDA Zone Info for Columbia

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 Columbia

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