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

It's possible to figure out when it's possible to plant salpiglossis by referring to the USDA zone info for Cary.

Planting Calendar for Salpiglossis

Frost tolerance for salpiglossis:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since salpiglossis do not do well in cold weather it's necessary to wait until after the last frost before you can plant them.

The earliest that you can plant salpiglossis in Cary 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 salpiglossis and expect a good harvest is probably August. You probably don't want to wait any later than that or else your salpiglossis may not have a chance to really do well. If you are starting your salpiglossis indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Cary. In the coldest months of winter you should expect an average low temperature of 5°F.

Just be sure to remember that USDA zone info for Cary is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Cary you get surprised by a frost after April 15 so just be sure to be ready to cover your salpiglossis in the event of a surprise late frost.

USDA Zone Info for Cary

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Cary

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