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.

A common way of getting a good idea when it's a good idea to plant hemerocallis is to consult the USDA zone info for Columbus.

Planting Calendar for Hemerocallis

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

Hemerocallis do well in moderate cold which means that you can get them planted earlier than other plants that might not handle the cold.

The earliest that you can plant hemerocallis 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 hemerocallis and expect a good harvest is probably September. Any later than that and your hemerocallis may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your hemerocallis indoors.

Last Frost Date

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

Since the USDA zone info for Columbus is an average the actual date of last frost will vary from year to year. Half of the time in Columbus you get a frost after April 15 so make sure that you are ready to protect your hemerocallis 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.