The USDA Zone info is a great tool for gardeners to help us determine 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.

You should be able to determine when it's the best time to plant arabis by looking at the USDA zone info for Hiawatha.

Planting Calendar for Arabis

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

Arabis do well in pretty solid cold which tells us that you can plant them quite a bit earlier in the year than other frost tender plants.

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

The last month that you can plant arabis and expect a good harvest is probably September. If you wait any later than that and your arabis may not have a chance to fully mature. You can get started a little bit earlier by starting your arabis indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Hiawatha. In the coldest months of winter you should expect an average low temperature of -20°F.

Since the USDA zone info for Hiawatha is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Hiawatha last frost occurs after April 15 so make sure that you are prepared to protect your arabis if you have one of those late frosts.

USDA Zone Info for Hiawatha

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Hiawatha

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