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.

One way of estimating when it's the best time to plant bok choi is to refer to the USDA zone info for Marine City.

Planting Calendar for Bok Choi

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

Bok Choi tend to make it in mild cold which means that you can plant them a little earlier in the year than more sensitive plants.

The earliest that you can plant bok choi in Marine City 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 bok choi and expect a good harvest is probably September. Any later than that and your bok choi may not have a chance to fully mature. If you are starting your bok choi indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Marine City. You should expect an average low temperature of -10°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Marine City may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Marine City it frosts late in the year after April 15 so make sure that you are prepared to protect your bok choi in the event of a late frost.

USDA Zone Info for Marine City

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°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 -5°F.

Plants to Grow in Marine City

You may be interested in your other planting guides for Marine City.