One of the best tools that you have as gardeners to help us figure out 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 best time to plant mustard in Colby should be figured out by looking at the USDA zone info.

Planting Calendar for Mustard

Frost tolerance for mustard:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Mustard require warm weather which means that you have to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant mustard in Colby is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant mustard and expect a good harvest is probably August. Any later than that and your mustard may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your mustard indoors.

Last Frost Date

The average date of last frost is April 15 in Colby. You can expect an average low temperature of -15°F in the coldest months of winter.

Remember that USDA zone info for Colby is just an average and the actual date of last frost will vary from year to year. Since half of the time in Colby last frost occurs after April 15 be ready to cover your mustard in the event of one of those late frosts.

USDA Zone Info for Colby

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Colby

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