The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of estimating when it's possible to plant centaurea is to refer to the USDA zone info for Dublin.

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 little earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant centaurea in Dublin 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 really do well. You can get started a few weeks earlier by starting your centaurea indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Dublin. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Dublin may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Dublin you get a frost after April 15 be ready to protect your centaurea in the event of a surprise late frost.

USDA Zone Info for Dublin

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 Dublin

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