Before planting it is a good idea to find your USDA Zone info to determine 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 determine when it's possible to plant thunbergia in Kasson by checking out the USDA zone info.

Planting Calendar for Thunbergia

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

It's a bad idea to plant thunbergia until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant thunbergia in Kasson is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant thunbergia and expect a good harvest is probably August. You probably don't want to wait any later than that or else your thunbergia may not have a chance to fully mature. Starting your thunbergia indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost has passed is on May 15 in Kasson. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Kasson is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Kasson you get surprised by a frost after May 15 be ready to cover your thunbergia in the event of a surprise late frost.

USDA Zone Info for Kasson

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Kasson

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