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.

The USDA zone info for Millbrae can be used to estimate when it's possible to plant mustard.

Planting Calendar for Mustard

Frost tolerance for mustard:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since mustard do not do well in cold weather you need to wait until after the last frost has passed before you can plant them.

The earliest that you can plant mustard in Millbrae 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 mustard and expect a good harvest is probably September. Any later than that and your mustard may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your mustard indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Millbrae. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for Millbrae is not always accurate the actual date of last frost changes from year to year. Since half of the time in Millbrae you get a frost after January 31 be ready to protect your mustard in the event of a late frost.

USDA Zone Info for Millbrae

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 Millbrae

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