Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

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

Planting Calendar for Hemerocallis

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

Hemerocallis are moderately cold tolerant which means that you can plant them earlier than other frost tender plants.

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

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

Last Frost Date

The average date of last frost is January 31 in Pomona. In the coldest months of winter you should expect an average low temperature of 30°F.

Since the USDA zone info for Pomona is an average the actual date of last frost will vary from year to year. Half of the time in Pomona you get a frost after January 31 so be sure to be ready to protect your hemerocallis in the event of a late frost.

USDA Zone Info for Pomona

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Pomona

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