One of the first steps you take when you are determining your gardening schedule is find your 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.

By using the USDA zone info for Union City you will be able to estimate when you can plant mustard greens.

Planting Calendar for Mustard greens

Frost tolerance for mustard greens:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Mustard greens do well in moderate cold which tells us that you can plant them earlier than more sensitive plants.

The earliest that you can plant mustard greens in Union City 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 greens and expect a good harvest is probably October. If you wait any later than that and your mustard greens may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your mustard greens indoors.

Last Frost Date

The average date of last frost is January 31 in Union City. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Union City is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Union City you get a frost after January 31 so always be ready to protect your mustard greens if you have a late frost.

USDA Zone Info for Union City

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 Union City

You may be interested in your other planting guides for Union City.