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.

The best time to plant red cabbage in Zone 1a should be estimated by using the USDA zone info.

Planting Calendar for Red cabbage

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

You can plant red cabbage quite a bit earlier in the year because they are very cold tolerant.

The earliest that you can plant red cabbage in Zone 1a is May. However, you really should wait until June 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 July. You probably don't want to wait any later than that or else 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

On average the last frost has passed is on June 15 in Zone 1a. It might get as low as -60°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Zone 1a and it can change quite a bit from year to year. Half of the time in Zone 1a it frosts late in the year after June 15 so make sure that you are ready to cover your red cabbage if you have one of those late frosts.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-60°F
Highest Expected Low	-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in your other planting guides for Zone 1a.