Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You should be able to determine when it's a good idea to plant bachelor buttons by referring to the USDA zone info for Hillsboro.

Planting Calendar for Bachelor Buttons

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

Since bachelor buttons do well in moderate cold you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant bachelor buttons 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 bachelor buttons and expect a good harvest is probably September. Any later than that and your bachelor buttons may not have a chance to fully mature. You can get started a little bit earlier by starting your bachelor buttons indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Hillsboro may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in Hillsboro last frost occurs after March 15 be ready to protect your bachelor buttons if you have a late frost.

USDA Zone Info for Hillsboro

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Hillsboro

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