One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for Janesville it's possible to estimate when it's a good idea 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.

You can plant gayfeather much earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

The earliest that you can plant gayfeather in Janesville 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. If you wait any later than that and your gayfeather may not have a chance to fully mature. You can get started a few weeks earlier by starting your gayfeather indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Janesville. It might get as low as -20°F during the coldest months of winter.

It's important to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Janesville and it is different every year. Since half of the time in Janesville you get a frost after April 15 be ready to cover your gayfeather in the event of one of those late frosts.

USDA Zone Info for Janesville

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°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 -15°F.

Plants to Grow in Janesville

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