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.

You can figure out when to plant centaurea in Circle Pines by reviewing 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.

You can plant centaurea a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant centaurea in Circle Pines 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 centaurea and expect a good harvest is probably August. Any later than that and your centaurea may not have a chance to really do well. Starting your centaurea indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on May 15 in Circle Pines. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Circle Pines is an average the actual date of last frost is different every year. Since half of the time in Circle Pines it frosts late in the year after May 15 be ready to protect your centaurea if you have a surprise late frost.

USDA Zone Info for Circle Pines

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Circle Pines

You may be interested in your other planting guides for Circle Pines.