One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

The USDA zone info for Petersburg can be used to determine when you can plant red cabbage.

Planting Calendar for Red cabbage

Frost tolerance for red cabbage:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since red cabbage are very cold tolerant you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant red cabbage 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 red cabbage and expect a good harvest is probably September. Any later than that and your red cabbage may not have a chance to really do well. You can get started a couple of weeks earlier by starting your red cabbage indoors.

Last Frost Date

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

Always keep in mind that USDA zone info for Petersburg is an average and the actual date of last frost is different every year. Since half of the time in Petersburg last frost occurs after April 15 be ready to cover your red cabbage if you have 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.