One of the best tools that you have as gardeners to help us determine 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.

By referring to the USDA zone info for Guthrie you should be able to estimate when you can plant thunbergia.

Planting Calendar for Thunbergia

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

Since thunbergia require warm weather it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant thunbergia in Guthrie 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 thunbergia and expect a good harvest is probably August. If you wait any later than that and your thunbergia may not have a chance to fully mature. If you are starting your thunbergia indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Guthrie. It might get as low as 0°F during the coldest months of winter.

Remember that USDA zone info for Guthrie is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Guthrie it frosts late in the year after April 15 so make sure that you are prepared to protect your thunbergia if you have one of those late frosts.

USDA Zone Info for Guthrie

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Guthrie

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