When to Plant Hemerocallis in Zone 1b

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.

A common way of estimating when to plant hemerocallis is to examine the USDA zone info for Zone 1b.


Planting Calendar for Hemerocallis

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

Since hemerocallis are moderately cold tolerant you can plant them a little bit earlier in the year than other plants that might not handle the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant hemerocallis
Possibly ok, but a risky time to plant hemerocallis
Probably not a good time to plant hemerocallis

The earliest that you can plant hemerocallis in Zone 1b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant hemerocallis and expect a good harvest is probably July. If you wait any later than that and your hemerocallis may not have a chance to fully mature. If you are starting your hemerocallis indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost is on June 15 in Zone 1b. In the coldest months of winter you can expect an average low temperature of -55°F.

Since the USDA zone info for Zone 1b is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Zone 1b there is a last frost after June 15 so always be ready to protect your hemerocallis in the event of a surprise late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.