Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. 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 chinese cabbage in Zone 4a should be figured out by checking out the USDA zone info.

Planting Calendar for Chinese cabbage

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

You can plant chinese cabbage just a bit earlier in the year because they are moderately cold tolerant.

The earliest that you can plant chinese cabbage in Zone 4a 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 chinese cabbage and expect a good harvest is probably August. Any later than that and your chinese cabbage may not have a chance to fully mature. If you are starting your chinese cabbage indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Zone 4a the average date of last frost happens on May 15. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 4a and it is different every year. Half of the time in Zone 4a you get a frost after May 15 so make sure that you are ready to cover your chinese cabbage in the event of a surprise late frost.

USDA Zone Info for Zone 4a

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Zone 4a

You may be interested in your other planting guides for Zone 4a.