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Hemerocallis Hybrids
daylily
Hybrid of garden origin; parent species are native to China, Japan, Korea, and Siberia across diverse habitats from woodland edges and moist meadows to dry hillsides; H. fulva (tawny daylily) has naturalized widely across North American roadsides and disturbed ground and runs as an invasive species in some regional contexts
Overview
Hemerocallis Hybrids are a diverse group of clump-forming perennials in the family Asphodelaceae, derived from interspecific crosses involving Hemerocallis fulva, H. lilioasphodelus, H. citrina, and numerous other Asian species. Hybrid daylilies form mounds of arching strap-like leaves 12–30 inches (30–75 cm) long, semi-evergreen to deciduous depending on the individual cultivar. Branched scapes rise 12–48 inches (30–120 cm) above the foliage clump, each scape bearing 12–25 or more flower buds across the bloom period. Individual flowers 2–7 inches (5–18 cm) wide open for a single day only; the sequential succession of buds supplies a display of 2–5 weeks per scape across the overall garden contribution. Flower form selections range from simple six-tepaled stars through spiders, doubles, ruffled, triangular, and recurved types; flower color selections span the full spectrum except true blue and pure white, with bicolors, halos, and patterned throats present across modern cultivar introductions. Many cultivars are repeat-blooming (reblooming), producing additional scapes through summer and into fall beyond the primary bloom flush. Some cultivars, particularly yellow-flowered selections, carry a light fragrance through the bloom window. Established plants run drought-tolerant and long-lived. All Hemerocallis species and hybrids run highly toxic to cats and cause acute kidney failure in feline exposure cases — a significant concern for gardens shared with cat companions.
Native Range
Hybrid daylilies are of garden origin from hybridization programs spanning the 19th through 21st centuries. The parent species are native to China, Japan, Korea, and Siberia, where the genus grows in diverse habitats from woodland edges and moist meadows to dry hillsides. Hemerocallis fulva (the tawny daylily) has naturalized widely across North America along roadsides and on disturbed ground, and runs as an invasive species in some regional contexts where the plant outcompetes native vegetation.Suggested Uses
Planted as specimen plants, mass plantings, or border plants at 18–24 inch (45–60 cm) spacing in zone-3-and-warmer gardens. Tolerates a wide range of soils and cultivation conditions across the genus. Useful as a low-maintenance ground cover on slopes where the spreading clump habit supplies erosion-resistant coverage with minimal annual intervention. The wide range of flower forms and color selections across the cultivar group supports mixing early, mid, and late cultivars for a season-long combined display. Reblooming cultivars supply longer individual plant bloom performance across the growing season. All parts are toxic to cats and cause acute kidney failure in feline exposure cases.How to Identify
Appearance
Size & Dimensions
Height1' - 4'
Width/Spread1'6" - 2'
Colors
Bloom Information
Bloom season varies by individual cultivar from early-season (May–June) through midseason (June–July) and late-season (August–September) selections, in addition to repeat-blooming cultivars that produce multiple flushes across the growing season. An individual scape blooms over 2–5 weeks. Planting a combination of early, mid, and late cultivars extends the blooming season from May through September at the collection level. Reblooming cultivars require adequate soil moisture and fertility between flushes to sustain additional scape production.Detailed Descriptions
Flower Description
Full color spectrum except true blue and pure white; yellow, orange, red, pink, purple, lavender, peach, and cream selections available in commercial cultivation, along with bicolors, halos, and patterned throats; individual flowers 2-7 inches wide open for a single day eachFoliage Description
Medium green; arching strap-like leaves 12-30 inches long forming mounded clumps across the growing season; semi-evergreen to deciduous depending on the individual cultivarGrowing Conditions
Sun Requirements
Requires 4-8 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Full sun to partial shade in any fertile well-drained soil (pH 6.0–7.0) matches the genus's cultivation needs. Daylilies tolerate a wide range of soil types from light sandy loams through heavier clays. Full-sun positions produce the most prolific bloom; partial-shade positions extend individual flower life but reduce total flower quantity across the clump. Water runs through establishment; established plants run drought-tolerant but bloom most heavily with moderate summer irrigation. A balanced fertilizer is applied in early spring as foliage emerges and again in early summer for reblooming types to sustain additional scape production. Division runs every 4–5 years in early spring or late summer when flower production declines or clumps become congested. All parts run highly toxic to cats and cause acute kidney failure in feline exposure cases; plants are positioned away from garden areas frequented by cat companions as the primary mitigation for this risk.Pruning
Individual spent scapes are removed at ground level after all buds on the scape have opened. Dead leaf tips and yellowed foliage are trimmed through the season to keep plants tidy. Deciduous types are cut to the ground in fall after frost; semi-evergreen and evergreen types are cut back by one-half in early spring. Division runs in early spring or late summer every 4–5 years by lifting and separating the crowns with a sharp knife or spade.Pruning Schedule
J
F
M
A
M
J
J
A
S
O
N
D
early springfall
Maintenance Level
lowContainer Growing
✓ Suitable for container growing
Minimum container size: 5 gallons