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.

A common way of making a decision about when it's a good idea to plant bok choi is to examine the USDA zone info for Walnut.

Planting Calendar for Bok Choi

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

You can plant bok choi a little earlier in the year because they do well in moderate cold.

The earliest that you can plant bok choi in Walnut is January. However, you really should wait until February 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 October. Any later than that and your bok choi may not have a chance to grow to maturity. Starting your bok choi indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is January 31 in Walnut. In the coldest months of winter you should expect an average low temperature of 30°F.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Walnut and it can change quite a bit from year to year. Half of the time in Walnut it frosts late in the year after January 31 so make sure that you are ready to protect your bok choi if you have a late frost.

USDA Zone Info for Walnut

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°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 35°F.

Plants to Grow in Walnut

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