When can I plant Thunbergia in Zone 6a

One of the best tools that we have as gardeners to help us determine our 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 our area.

You should be able to estimate when you can plant thunbergia by looking at the USDA zone info for Zone 6a.


Planting Calendar for Thunbergia

Frost tolerance for thunbergia: Not tolerant of frost.
When you should plant them: After the last frost.

Thunbergia do not do well in cold weather which tells us that you need to wait until it warms up after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant thunbergia
Possibly ok, but a risky time to plant thunbergia
Probably not a good time to plant thunbergia

The earliest that you can plant thunbergia in Zone 6a 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. 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

In Zone 6a the average date of last frost happens on April 15. In the coldest months of winter we can expect an average low temperature of -10°F.

Since the USDA zone info for Zone 6a may not be accurate from year to year our actual date of last frost will vary from year to year. Half of the time in Zone 6a we get surprised by a frost after April 15 so always be ready to cover your thunbergia if we have a surprise late frost.

USDA Zone Info for Zone 6a

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 Zone 6a

You may be interested in our other planting guides for Zone 6a.