One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of estimating when you can plant thunbergia is to look at the USDA zone info for Hillside.

Planting Calendar for Thunbergia

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

Since thunbergia are not cold tolerant you really should wait until after the last frost before you can plant them.

The earliest that you can plant thunbergia in Hillside 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 grow to maturity. Starting your thunbergia indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Since the USDA zone info for Hillside may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Hillside there is a last frost after April 15 be ready to protect your thunbergia if you have a surprise late frost.

USDA Zone Info for Hillside

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 Hillside

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