One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Oswego should be looked at to figure out when it's possible to plant gayfeather.

Planting Calendar for Gayfeather

Frost tolerance for gayfeather:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Gayfeather do well in cold which means that you can plant them much earlier than more sensitive plants.

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

Last Frost Date

The average date of last frost is April 15 in Oswego. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Oswego is just an average the actual date of last frost changes from year to year. Since half of the time in Oswego you get a frost after April 15 be ready to cover your gayfeather if you have a late frost.

USDA Zone Info for Oswego

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Oswego

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