The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant fiber optic grass in Havre can be determined by using the USDA zone info.

Planting Calendar for Fiber Optic Grass

Frost tolerance for fiber optic grass:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Fiber Optic Grass require warm weather which means that it's important to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant fiber optic grass in Havre is May. However, you really should wait until June 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. You probably don't want to wait any later than that or else your fiber optic grass may not have a chance to really do well. Starting your fiber optic grass indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on May 15 in Havre. You can expect an average low temperature of -30°F in the coldest months of winter.

Since the USDA zone info for Havre is just an average the actual date of last frost is different every year. Since half of the time in Havre it frosts late in the year after May 15 be ready to cover your fiber optic grass in the event of a surprise late frost.

USDA Zone Info for Havre

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 Havre

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