One of the first steps you take when you are estimating 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.

You should be able to figure out when you can plant mustard by referring to the USDA zone info for Eureka.

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 must wait until after the last frost before you can plant them.

The earliest that you can plant mustard in Eureka is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant mustard and expect a good harvest is probably August. Any later than that and your mustard may not have a chance to fully mature. You can get started a few weeks earlier by starting your mustard indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Eureka. In the coldest months of winter you can expect an average low temperature of -15°F.

Remember that USDA zone info for Eureka may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Eureka it frosts late in the year after April 15 so make sure that you are prepared to protect your mustard in the event of a surprise late frost.

USDA Zone Info for Eureka

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 Eureka

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