The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Oregon City you can figure out when it's a good idea to plant echinacea 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 other frost tender plants.

The earliest that you can plant echinacea in Oregon City 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 echinacea and expect a good harvest is probably August. Any later than that and your echinacea may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your echinacea indoors.

Last Frost Date

The average date of last frost is March 15 in Oregon City. You should expect an average low temperature of 15°F in the coldest months of winter.

Always keep in mind that USDA zone info for Oregon City is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Oregon City last frost occurs after March 15 so make sure that you are prepared to protect your echinacea in the event of a late frost.

USDA Zone Info for Oregon City

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Oregon City

You may be interested in your other planting guides for Oregon City.