Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of figuring out when it's a good idea to plant gaillardia is to look at the USDA zone info for Prosser.

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 can survive in some cold which means that you can plant them a bit earlier in the year than other frost tender plants.

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

Last Frost Date

The average date of last frost is April 15 in Prosser. In the coldest months of winter you should expect an average low temperature of 0°F.

Since the USDA zone info for Prosser is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Prosser you get surprised by a frost after April 15 so be sure to be ready to protect your gaillardia if you have a late frost.

USDA Zone Info for Prosser

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Prosser

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