Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to estimate when to plant gayfeather by checking out the USDA zone info for Northbrook.

Planting Calendar for Gayfeather

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

Since gayfeather do well in cold you can plant them a lot earlier in the year than more sensitive plants.

The earliest that you can plant gayfeather in Northbrook 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. Any later than that and your gayfeather may not have a chance to really do well. You can get started a few weeks earlier by starting your gayfeather indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Northbrook is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Northbrook you get surprised by a frost after April 15 so make sure that you are prepared to protect your gayfeather in the event of one of those late frosts.

USDA Zone Info for Northbrook

Here is the info for USDA Zone 5b.

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

Plants to Grow in Northbrook

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