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.

You should be able to estimate when it's possible to plant rhubarb by checking out the USDA zone info for Hibbing.

Planting Calendar for Rhubarb

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

Rhubarb do well in mild cold which means that you can plant them a little bit earlier in the year than more sensitive plants.

The earliest that you can plant rhubarb in Hibbing 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. You probably don't want to wait any later than that or else your rhubarb may not have a chance to grow to maturity. If you are starting your rhubarb indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

The average date of last frost is May 15 in Hibbing. It might get as low as -35°F during the coldest months of winter.

Remember that USDA zone info for Hibbing is just an average and the actual date of last frost changes from year to year. Half of the time in Hibbing it frosts late in the year after May 15 so make sure that you are prepared to protect your rhubarb in the event of one of those late frosts.

USDA Zone Info for Hibbing

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-35°F
Highest Expected Low	-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Hibbing

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