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

The best time to plant carnation in Hillsboro can be estimated by using the USDA zone info.

Planting Calendar for Carnation

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

Carnation do ok in pretty solid cold which means that you can plant them quite a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant carnation in Hillsboro 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 carnation and expect a good harvest is probably September. If you wait any later than that and your carnation may not have a chance to grow to maturity. You can get started a little bit earlier by starting your carnation indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Hillsboro. In the coldest months of winter you can expect an average low temperature of -10°F.

Always keep in mind that USDA zone info for Hillsboro is an average and the actual date of last frost changes from year to year. Half of the time in Hillsboro there is a last frost after April 15 so be sure to be ready to cover your carnation if you have a surprise late frost.

USDA Zone Info for Hillsboro

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 Hillsboro

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