One of the first steps you take when you are determining 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.

The first opportunity to plant leeks in Hillsboro can be determined by referring to the USDA zone info.

Planting Calendar for Leeks

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

Leeks do well in cold weather which tells us that you can plant them a lot earlier in the year than other frost tender plants.

The earliest that you can plant leeks 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 leeks and expect a good harvest is probably September. If you wait any later than that and your leeks may not have a chance to really do well. You can get started a little bit earlier by starting your leeks indoors.

Last Frost Date

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

Always keep in mind that USDA zone info for Hillsboro is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Hillsboro it frosts late in the year after March 15 be ready to cover your leeks in the event of a surprise 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.