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.

By using the USDA zone info for El Mirage you should be able to determine when it's the best time 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 really should wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant mustard in El Mirage 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 fully mature. Starting your mustard indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in El Mirage. It might get as low as 25°F during the coldest months of winter.

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for El Mirage and it changes from year to year. Since half of the time in El Mirage it frosts late in the year after February 15 be ready to protect your mustard in the event of a surprise late frost.

USDA Zone Info for El Mirage

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 El Mirage

You may be interested in your other planting guides for El Mirage.