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

The first chance to plant festuca in Helena should be estimated by checking out the USDA zone info.

Planting Calendar for Festuca

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

You can plant festuca a little bit earlier in the year because they do well in moderate cold.

The earliest that you can plant festuca in Helena 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 festuca and expect a good harvest is probably August. You probably don't want to wait any later than that or else your festuca may not have a chance to fully mature. You can get started a few weeks earlier by starting your festuca indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Helena. You can expect an average low temperature of -25°F in the coldest months of winter.

Remember that USDA zone info for Helena is an average and the actual date of last frost is different every year. Since half of the time in Helena you get a frost after May 15 be ready to cover your festuca in the event of a surprise late frost.

USDA Zone Info for Helena

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Helena

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