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

In Juneau you can figure out when it's possible to plant centaurea by referring to the USDA zone info.

Planting Calendar for Centaurea

Frost tolerance for centaurea:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Centaurea are moderately cold tolerant which tells us that you can get them planted earlier than other frost tender plants.

The earliest that you can plant centaurea in Juneau 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 centaurea and expect a good harvest is probably September. You probably don't want to wait any later than that or else your centaurea may not have a chance to fully mature. If you are starting your centaurea indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost has passed is on April 15 in Juneau. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Juneau is just an average the actual date of last frost will vary from year to year. Half of the time in Juneau you get surprised by a frost after April 15 so make sure that you are prepared to protect your centaurea in the event of a late frost.

USDA Zone Info for Juneau

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Juneau

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