One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant rhubarb in Billings should be estimated by reviewing the USDA zone info.

Planting Calendar for Rhubarb

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

Rhubarb can survive in mild cold which means that you can plant them a little earlier in the year than other frost tender plants.

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

The last month that you can plant rhubarb and expect a good harvest is probably August. If you wait any later than that and your rhubarb may not have a chance to really do well. If you are starting your rhubarb indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Billings is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Billings it frosts late in the year after May 15 so make sure that you are prepared to protect your rhubarb if you have a late frost.

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.