One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when it's possible to plant basil by checking out the USDA zone info for Hillsboro.

Planting Calendar for Basil

Frost tolerance for basil:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since basil are not cold tolerant you have to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant basil in Hillsboro is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant basil and expect a good harvest is probably August. If you wait any later than that and your basil may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your basil indoors.

Last Frost Date

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

Keep in mind that the actual date of last frost is not always accurate because it is based on the USDA zone info for Hillsboro and it is different every year. Since half of the time in Hillsboro there is a last frost after March 15 be ready to protect your basil if you have one of those late frosts.

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.