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.

It's possible to determine when it's the best time to plant gaillardia by referring to the USDA zone info for Watertown.

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 barely cold tolerant which tells us that you can start planting them slightly earlier than other frost tender plants.

The earliest that you can plant gaillardia in Watertown 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. 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 couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on May 15 in Watertown. You should expect an average low temperature of -30°F in the coldest months of winter.

It's important to remember that USDA zone info for Watertown is just an average and the actual date of last frost changes from year to year. Since half of the time in Watertown you get a frost after May 15 be ready to protect your gaillardia in the event of a surprise late frost.

USDA Zone Info for Watertown

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 Watertown

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