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.

The USDA zone info for San Luis Obispo can be read to estimate when you can plant hemerocallis.

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 mild cold which tells us that you can plant them a little earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant hemerocallis in San Luis Obispo 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. Any later than that and your hemerocallis may not have a chance to really do well. You can get started a couple of weeks earlier by starting your hemerocallis indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in San Luis Obispo. In the coldest months of winter you should expect an average low temperature of 25°F.

Keep in mind that USDA zone info for San Luis Obispo may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in San Luis Obispo it frosts late in the year after February 15 so make sure that you are prepared to cover your hemerocallis if you have a late frost.

USDA Zone Info for San Luis Obispo

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°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 30°F.

Plants to Grow in San Luis Obispo

You may be interested in your other planting guides for San Luis Obispo.