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

You should be able to determine when to plant napa cabbage by using the USDA zone info for Breckenridge.

Planting Calendar for Napa cabbage

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

Napa cabbage are very cold tolerant which tells us that you can plant them a quite a bit earlier than more sensitive plants.

The earliest that you can plant napa cabbage in Breckenridge 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 napa cabbage and expect a good harvest is probably September. You probably don't want to wait any later than that or else your napa cabbage may not have a chance to fully mature. You can get started a few weeks earlier by starting your napa cabbage indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Breckenridge. It might get as low as 10°F during the coldest months of winter.

Keep in mind that USDA zone info for Breckenridge is an average and the actual date of last frost is different every year. Since half of the time in Breckenridge there is a last frost after March 15 be ready to protect your napa cabbage in the event of one of those late frosts.

USDA Zone Info for Breckenridge

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Breckenridge

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