One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's possible to plant mustard by checking out the USDA zone info for Hanford.

Planting Calendar for Mustard

Frost tolerance for mustard:	Not tolerant of frost.
When to plant:	After the last frost.

Since mustard are not cold tolerant you really should wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant mustard in Hanford is March. However, you really should wait until April 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 grow to maturity. If you are starting your mustard indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Hanford. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Hanford is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Hanford it frosts late in the year after February 15 so be sure to be ready to cover your mustard if you have one of those late frosts.

USDA Zone Info for Hanford

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Hanford

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