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.

The best time to plant chinese chives in Hillsboro can be estimated by referring to the USDA zone info.

Planting Calendar for Chinese chives

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

Chinese chives can survive in some cold which means that you can plant them a little bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant chinese chives 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 chinese chives and expect a good harvest is probably September. You probably don't want to wait any later than that or else your chinese chives may not have a chance to really do well. Starting your chinese chives indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on March 15 in Hillsboro. You should expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Hillsboro is just an average and the actual date of last frost changes from year to year. Half of the time in Hillsboro last frost occurs after March 15 so just be sure to be ready to protect your chinese chives if you have a surprise late frost.

USDA Zone Info for Hillsboro

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Hillsboro

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