The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Ironwood you can determine when it's possible to plant jerusalem artichokes by referring to the USDA zone info.

Planting Calendar for Jerusalem artichokes

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

Jerusalem artichokes do well in a little bit of cold which tells us that you can plant them a little earlier in the year than other plants that might not handle the cold.

The earliest that you can plant jerusalem artichokes in Ironwood 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 jerusalem artichokes and expect a good harvest is probably August. Any later than that and your jerusalem artichokes may not have a chance to really do well. If you are starting your jerusalem artichokes indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Ironwood the average date of last frost happens on May 15. You can expect an average low temperature of -30°F in the coldest months of winter.

Keep in mind that the actual date of last frost is just an average because it is based on the USDA zone info for Ironwood and it can change quite a bit from year to year. Half of the time in Ironwood there is a last frost after May 15 so just be sure to be ready to cover your jerusalem artichokes in the event of a surprise late frost.

USDA Zone Info for Ironwood

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Ironwood

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