Daylily 'Mauna Loa'


Family: Hemerocallidaceae (hem-er-oh-kal-id-AY-see-ee) (Info)
Genus: Hemerocallis (hem-er-oh-KAL-iss) (Info)
Cultivar: Mauna Loa
Hybridized by Roberts
Registered or introduced: 1976
» View all varieties of Daylilies


18-24 in. (45-60 cm)


15-18 in. (38-45 cm)


USDA Zone 3a: to -39.9 C (-40 F)

USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing the rootball

Bloom Time:

Early midseason (EM)

Reblooming (Re)

Flower Size:

Large (more than 4.5" diameter)

Blooming Habit:

Diurnal (diu.)

Flower Type:


Bloom Color:


Color Patterns:



Flower Fragrance:

No fragrance

Foliage Habit:

Dormant (dor.)



Awards (if applicable):

Honorable Mention

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


This plant is said to grow outdoors in the following regions:

Gaylesville, Alabama

Encino, California

Snellville, Georgia

Anna, Illinois

Downers Grove, Illinois

Hanna City, Illinois

Logansport, Indiana

Cedar Rapids, Iowa

Ewing, Kentucky

Hazard, Kentucky

Hebron, Kentucky

Durham, Maine

Dearborn Heights, Michigan

Gladwin, Michigan

Hemlock, Michigan

Fairfax, Minnesota

Auburn, New Hampshire

Southold, New York

Morehead City, North Carolina

Raleigh, North Carolina

North Ridgeville, Ohio

Uniontown, Ohio

Hulbert, Oklahoma

Freedom, Pennsylvania

Norristown, Pennsylvania

Waterbury Center, Vermont

Falls Church, Virginia

Kalama, Washington

Fond Du Lac, Wisconsin

Madison, Wisconsin

Milwaukee, Wisconsin

Mount Horeb, Wisconsin

show all

Gardeners' Notes:


On Sep 27, 2015, Tracey25 from Colmesneil, TX (Zone 8a) wrote:

Perhaps Mauna Loa is better suited for colder climates than mine. Here is southeast Texas, I find that it is a poor bloomer, and prone to rust. It's being pulled for lack of vigor and stamina.


On Jun 28, 2011, jmcbackyarddigger from Anna, IL wrote:

I usually shy away from orange flowers. This one is a must. If you've seen the lava flow from "Mauna Loa" in Hawaii, you can understand how this plant got its name. LOVE THIS PLANT!!


On Jun 9, 2011, Bazuhi from Downers Grove, IL (Zone 5a) wrote:

Loved the flowers on this daylily when I saw it at the local Home Depot so I had to it it to my collection in 2010. So far this year it has returned but not with the gusto of my other daylilies. I can't wait for the bright orange flower!


On Mar 14, 2007, braun06 from Irving, TX (Zone 8a) wrote:

I was very pleased with this daylily. It is very nice looking. It may not repeat bloom but no repeat bloomer has a mixture of colors like this in our climate at least. It even has a fragrance which I was not expecting and it was quite noticable towards the end of the day.


On Apr 11, 2006, lilyq from Fairfax, MN wrote:

Beautiful flower--draws your attention right away...grows very well in MN and has multiplied pretty fast for me.


On Jan 24, 2003, mystic from Ewing, KY (Zone 6a) wrote:

This has to be the brightest orange daylily. Has large 5" blooms that really add a bright spot to the garden.


On Jan 21, 2003, poppysue from Westbrook, ME (Zone 5a) wrote:

Roberts (1976), 22" tall, 5" bloom

Mauna Loa is large, bright and dependable! You can't beat her for an inexpensive daylily.