The USDA Zone info is a great tool for gardeners to help us estimate 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 earliest that you can plant echinacea in Warrenton can be figured out by looking at the USDA zone info.

Planting Calendar for Echinacea

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

Since echinacea do ok in moderate cold you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant echinacea in Warrenton is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant echinacea and expect a good harvest is probably September. Any later than that and your echinacea may not have a chance to fully mature. Starting your echinacea indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in Warrenton. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Warrenton may not be accurate from year to year the actual date of last frost changes from year to year. Half of the time in Warrenton last frost occurs after February 15 so be sure to be ready to protect your echinacea in the event of a surprise late frost.

USDA Zone Info for Warrenton

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

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

Plants to Grow in Warrenton

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