One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. 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 a good idea to plant bok choi is to use the USDA zone info for Fremont.

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 do well in moderate cold which tells us that you can get them planted earlier than plants that are more sensitive to the cold.

The earliest that you can plant bok choi in Fremont 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 really do well. You can get started a little bit earlier by starting your bok choi indoors.

Last Frost Date

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

Since the USDA zone info for Fremont is just an average the actual date of last frost will vary from year to year. Half of the time in Fremont you get surprised by a frost after April 15 so make sure that you are ready to cover your bok choi in the event of a late frost.

USDA Zone Info for Fremont

Here is the info for USDA Zone 5b.

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

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

Plants to Grow in Fremont

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