Perennial Flower

When to Plant Daylilies in Hawaii

Nearly indestructible perennials with stunning trumpet-shaped blooms. Each flower lasts just one day, but the show goes on for weeks.

The Short Answer

In Hawaii, plant daylilies based on your regional frost dates. Coastal Hawaii has a last frost around None, while Upcountry/Mountain sees frost end around Rare. Tropical. Year-round growing season at lower elevations. Elevation creates microclimates. Plant warm-season crops...

Hawaii Frost Dates

Your planting dates depend on which part of Hawaii you're in. Here are the frost date ranges by region:

Region	Zones	Last Frost (Spring)	First Frost (Fall)
Coastal Hawaii	11a, 11b, 12a, 12b, 13a	None	None
Upcountry/Mountain	10a, 10b, 11a	Rare	Rare

Daylilies Planting Schedule for Hawaii

Coastal Hawaii (Zones 11a, 11b, 12a, 12b, 13a)

Average last frost: None · Average first frost: None

Transplant Outside

0 wks after frost

Upcountry/Mountain (Zones 10a, 10b, 11a)

Average last frost: Rare · Average first frost: Rare

Transplant Outside

0 wks after frost

Growing Daylilies in Hawaii

Daylilies in Hawaii's Climate

Daylilies grow well in subtropical conditions — unlike hostas, they handle the heat. Choose evergreen varieties for year-round foliage. Dormant types don't get enough cold for proper dormancy cycling and perform poorly. Stella de Oro and other rebloomers produce flushes of bloom throughout the long warm season.

Soil Considerations for Hawaii

Volcanic soils — extremely fertile but can be acidic. Excellent drainage on slopes. Varies dramatically by island and elevation.

Hawaii Climate & Growing Season

Tropical. Year-round growing season at lower elevations. Elevation creates microclimates. Plant warm-season crops anytime. Daylilies can handle frost well, which is an advantage in Hawaii's climate. You can push planting dates earlier in spring and extend into fall.

Growing season length varies across Hawaii: Coastal Hawaii (11a, 11b, 12a, 12b, 13a) has a last frost around None, while Upcountry/Mountain (10a, 10b, 11a) sees frost end around Rare. This difference matters for daylilies — adjust your planting dates to match your specific region.

Growing Tips

Plant bare-root or divisions in spring or fall. Divide clumps every 3-4 years to maintain vigor. Deadhead to keep gardens tidy.

Companion Planting

Plant daylilies alongside these companions for better growth:

Coneflowers Black Eyed Susans

The Bottom Line

Daylilies can be grown successfully across Hawaii, but your exact planting dates depend on which region you're in. Coastal Hawaii gardeners should plan around a None last frost, while those in Upcountry/Mountain can typically plant later. For exact dates based on your zip code, use our free planting date finder.

Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026