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.

One way of determining when it's the best time to plant potatos is to refer to the USDA zone info for Chisholm.

Planting Calendar for Potatos

Frost tolerance for potatos:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since potatos do well in cold you can plant them much earlier in the year than other plants that might not handle the cold.

The earliest that you can plant potatos in Chisholm 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 potatos and expect a good harvest is probably August. Any later than that and your potatos may not have a chance to really do well. Starting your potatos indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Chisholm the average date of last frost happens on May 15. You should expect an average low temperature of -35°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Chisholm and it changes from year to year. Half of the time in Chisholm there is a last frost after May 15 so be sure to be ready to protect your potatos in the event of a late frost.

USDA Zone Info for Chisholm

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 Chisholm

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