The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of figuring out when it's the best time to plant mustard greens is to refer to the USDA zone info for Colville.

Planting Calendar for Mustard greens

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

You can plant mustard greens a little earlier in the year because they do well in moderate cold.

The earliest that you can plant mustard greens in Colville 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. Any later than that and your mustard greens may not have a chance to fully mature. Starting your mustard greens indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Colville. In the coldest months of winter you can expect an average low temperature of -10°F.

Just be sure to remember that USDA zone info for Colville may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Colville you get a frost after April 15 be ready to cover your mustard greens in the event of a surprise late frost.

USDA Zone Info for Colville

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Colville

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