One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of estimating when it's the best time to plant hemerocallis is to examine the USDA zone info for Andover.

Planting Calendar for Hemerocallis

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

Hemerocallis tend to make it in mild cold which tells us that you can plant them a little bit earlier in the year than other frost tender plants.

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

The last month that you can plant hemerocallis and expect a good harvest is probably August. You probably don't want to wait any later than that or else your hemerocallis may not have a chance to fully mature. You can get started a few weeks earlier by starting your hemerocallis indoors.

Last Frost Date

On average all chance of frost has passed is on May 15 in Andover. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Andover is an average the actual date of last frost will vary from year to year. Since half of the time in Andover you get surprised by a frost after May 15 be ready to protect your hemerocallis in the event of a late frost.

USDA Zone Info for Andover

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Andover

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