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

You can estimate when you can plant snapdragons in Petersburg by referring to the USDA zone info.

Planting Calendar for Snapdragons

Frost tolerance for snapdragons:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Snapdragons do well in moderate cold which tells us that you can start planting them earlier than plants that are more sensitive to the cold.

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

The last month that you can plant snapdragons and expect a good harvest is probably September. Any later than that and your snapdragons may not have a chance to fully mature. You can get started a few weeks earlier by starting your snapdragons indoors.

Last Frost Date

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

Since the USDA zone info for Petersburg is an average the actual date of last frost is different every year. Half of the time in Petersburg you get a frost after April 15 so make sure that you are prepared to cover your snapdragons if you have one of those late frosts.

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.