One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Spearfish can be reffered to in order to estimate when you can plant fiber optic grass.

Planting Calendar for Fiber Optic Grass

Frost tolerance for fiber optic grass:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's not a good idea to plant fiber optic grass until after the last frost because they require warm weather.

The earliest that you can plant fiber optic grass in Spearfish is April. However, you really should wait until May if you don't want to take any chances.

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

Last Frost Date

On average the last 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 not always accurate the actual date of last frost will vary from year to year. Since half of the time in Spearfish there is a last frost after April 15 be ready to cover your fiber optic grass if you have a surprise 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.