The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can figure out when it's possible to plant chinese cabbage in Johnston by referring to 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.

Chinese cabbage do ok in some cold which means that you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant chinese cabbage in Johnston 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 chinese cabbage and expect a good harvest is probably September. Any later than that and your chinese cabbage may not have a chance to grow to maturity. Starting your chinese cabbage indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost is on April 15 in Johnston. It might get as low as -20°F during the coldest months of winter.

It's important to remember that USDA zone info for Johnston is just an average and the actual date of last frost changes from year to year. Since half of the time in Johnston it frosts late in the year after April 15 be ready to cover your chinese cabbage in the event of a surprise late frost.

USDA Zone Info for Johnston

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Johnston

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