Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Petersburg you can estimate when it's possible to plant angel's trumpets by reviewing the USDA zone info.

Planting Calendar for Angel's Trumpets

Frost tolerance for angel's trumpets:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Angel's Trumpets are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than plants that are more sensitive to the cold.

The earliest that you can plant angel's trumpets in Petersburg is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant angel's trumpets and expect a good harvest is probably August. You probably don't want to wait any later than that or else your angel's trumpets may not have a chance to really do well. You can get started a few weeks earlier by starting your angel's trumpets indoors.

Last Frost Date

The average date of last frost is April 15 in Petersburg. In the coldest months of winter you should expect an average low temperature of 5°F.

Keep in mind that USDA zone info for Petersburg may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Petersburg you get surprised by a frost after April 15 be ready to protect your angel's trumpets in the event of a surprise late frost.

USDA Zone Info for Petersburg

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 Petersburg

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