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.

In Spearfish you can estimate when you can plant coral bells by using the USDA zone info.

Planting Calendar for Coral Bells

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

You can plant coral bells just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant coral bells in Spearfish 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 coral bells and expect a good harvest is probably September. Any later than that and your coral bells may not have a chance to fully mature. Starting your coral bells indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Spearfish. You can expect an average low temperature of -20°F in the coldest months of winter.

Since the USDA zone info for Spearfish is just an average the actual date of last frost will vary from year to year. Half of the time in Spearfish it frosts late in the year after April 15 so always be ready to cover your coral bells if you have a late frost.

USDA Zone Info for Spearfish

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 Spearfish

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