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.

The USDA zone info for Billings can be read to estimate when to plant turnips.

Planting Calendar for Turnips

Frost tolerance for turnips:	Not tolerant of frost.
When to plant:	After the last frost.

You really shouldn't plant turnips 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 turnips in Billings is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant turnips and expect a good harvest is probably August. Any later than that and your turnips may not have a chance to grow to maturity. Starting your turnips indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Billings. You should expect an average low temperature of -25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Billings may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Billings you get surprised by a frost after May 15 so be sure to be ready to protect your turnips in the event of one of those late frosts.

USDA Zone Info for Billings

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Billings

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