One of the first steps you take when you are making a decision about 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.

In Gypsum you can figure out when it's a good idea to plant mustard greens by using the USDA zone info.

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 tend to make it in a little bit of cold which means that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant mustard greens in Gypsum is February. However, you really should wait until March 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 September. You probably don't want to wait any later than that or else your mustard greens may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your mustard greens indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Gypsum. You should expect an average low temperature of -20°F in the coldest months of winter.

Keep in mind that USDA zone info for Gypsum is an average and the actual date of last frost is different every year. Half of the time in Gypsum there is a last frost after April 15 so make sure that you are ready to cover your mustard greens if you have one of those late frosts.

USDA Zone Info for Gypsum

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Gypsum

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