One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. 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 Zone 13b should be looked at to estimate when you can plant mustard.

Planting Calendar for Mustard

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

It's probably not a good idea to plant mustard until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant mustard in Zone 13b 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 mustard and expect a good harvest is probably November. If you wait any later than that and your mustard may not have a chance to grow to maturity. Starting your mustard indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Zone 13b it never frosts. It might get as low as 65°F during the coldest months of winter.

Since the USDA zone info for Zone 13b may not be accurate from year to year the actual date of last frost will vary from year to year. Since it never frosts in Zone 13b you do not have to be ready to cover your mustard if you have one of those late frosts.

USDA Zone Info for Zone 13b

Here is the info for USDA Zone 13b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	65°F
Highest Expected Low	70°F

This means that on a really cold year, the coldest it will get is 65°F. On most years you should be prepared to experience lows near 70°F.

Plants to Grow in Zone 13b

You may be interested in your other planting guides for Zone 13b.