One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first chance to plant gaillardia in Havre can be figured out by checking out the USDA zone info.

Planting Calendar for Gaillardia

Frost tolerance for gaillardia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Gaillardia are one of those plants that can tolerate a tiny bit of cold weather which means that you can get them planted just a bit earlier than other plants that might not handle the cold.

The earliest that you can plant gaillardia in Havre 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 gaillardia and expect a good harvest is probably August. If you wait any later than that and your gaillardia may not have a chance to grow to maturity. If you are starting your gaillardia indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Havre. You should expect an average low temperature of -30°F in the coldest months of winter.

Remember that USDA zone info for Havre may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Havre you get a frost after May 15 so make sure that you are ready to protect your gaillardia if you have 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.