Illustration
Stella de Oro
Hemerocallis 'Stella de Oro'
Also called daylily
Stella de Oro blooms from June through September.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Stella de Oro
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–9. Expect it to reach about 12 in tall and 16 in wide at maturity, in roughly 2 years (not yet checked).
What was checked
Mature height and spread, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not, and each fact above says which. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Stella de Oro
Plant Stella de Oro in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 6, the middle of its hardy zones 3 to 9, spring means March to May and fall means August or September. Once settled, it blooms from June to September.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Stella de Oro get?
12 intall5 ft 7 inan adult16 inwideSee Stella de Oro in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant Stella de Oro
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Space Stella de Oro about 16 in apart, center to center, so each plant has room to reach its full width.
Add Stella de Oro to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
Stella de Oro's height, spread, hardiness zones, sun and trait tags were checked against 12 published sources on July 31, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- NC State ExtensionHemerocallisheight, spread, hardiness zones, sun, years to mature size and trait tags
- Walters GardensInc.height, spread, hardiness zones, sun, years to mature size and trait tags
- arborvalleynursery.comArbor Valley Nursery plant guideheight, spread, hardiness zones, sun and trait tags
- kb.jniplants.comJohnson's Nursery Knowledgebaseheight, spread, hardiness zones, sun and trait tags
- Missouri Botanical GardenPlant Finderheight, spread, hardiness zones, sun and trait tags
- RHSRoyal Horticultural Societyheight, spread, sun, years to mature size and trait tags
- wilsonbrosgardens.comWilson Bros Gardensheight, spread, hardiness zones, sun and trait tags
- Clemson Home and Garden Information CenterClemson Cooperative Extension Home & Garden Information Centerheight, sun and trait tags
- University of Illinois ExtensionIllinois Extension, Landscaping plant guideheight, hardiness zones and sun
- University of Minnesota Extensionheight, sun and trait tags
- daylilies.orgAmerican Daylily Society (AHS) cultivar registrationheight and trait tags
- University of Georgia ExtensionBulletin 944height
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Stella de Oro
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Highly toxic to cats: any part, even the pollen, can cause fatal acute kidney failure, the same effect true lilies have. Not toxic to dogs. per ASPCA and NC State
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.