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

In Columbus you can figure out when it's possible to plant leeks by reviewing 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.

You can plant leeks much earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

The earliest that you can plant leeks in Columbus 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. You probably don't want to wait any later than that or else your leeks may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your leeks indoors.

Last Frost Date

The average date of last frost is April 15 in Columbus. You can expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Columbus is just an average and the actual date of last frost will vary from year to year. Since half of the time in Columbus it frosts late in the year after April 15 be ready to protect your leeks in the event of a surprise late frost.

USDA Zone Info for Columbus

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°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 -10°F.

Plants to Grow in Columbus

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