Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By checking out the USDA zone info for Milpitas it's possible to estimate when it's a good idea to plant bok choi.

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 means that you can plant them earlier than other plants that might not handle the cold.

The earliest that you can plant bok choi in Milpitas 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. You probably don't want to wait any later than that or else your bok choi may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your bok choi indoors.

Last Frost Date

The average date of last frost is February 15 in Milpitas. In the coldest months of winter you can expect an average low temperature of 25°F.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Milpitas and it changes from year to year. Since half of the time in Milpitas it frosts late in the year after February 15 be ready to cover your bok choi if you have one of those late frosts.

USDA Zone Info for Milpitas

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

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

Plants to Grow in Milpitas

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