Daylilies (Hemerocallis) are perennial plants prized for their vibrant blooms, hardiness, and low-maintenance nature. Native to Asia, they thrive in U.S. gardens due to their adaptability to various climates and soil conditions. With thousands of cultivars available, daylilies offer a wide range of colors, shapes, and bloom times, making them a favorite among gardeners.
Below are some of the most popular daylily varieties cultivated in U.S. gardens, categorized by their unique characteristics.
Botanical Name: Hemerocallis 'Stella de Oro'
Features: This compact, reblooming variety produces golden-yellow flowers from early summer to fall. Its small size (12–18 inches tall) makes it ideal for borders and containers.
Growing Conditions: Prefers full sun to partial shade and well-drained soil. Hardy in USDA zones 3–9.
Botanical Name: Hemerocallis 'Happy Returns'
Features: A reblooming cultivar with soft lemon-yellow flowers and a sweet fragrance. It grows 18–24 inches tall and blooms profusely throughout the season.
Growing Conditions: Thrives in full sun and moist, fertile soil. Suitable for zones 3–9.
Botanical Name: Hemerocallis 'Pardon Me'
Features: A dwarf variety with deep red flowers and a yellow throat. It reblooms and reaches 12–18 inches in height, perfect for small gardens.
Growing Conditions: Adapts to full sun or light shade. Hardy in zones 3–9.
Botanical Name: Hemerocallis 'Chicago Apache'
Features: Known for its striking crimson-red flowers and a velvety texture. It grows 24–30 inches tall and blooms midseason.
Growing Conditions: Prefers full sun and well-drained soil. Best for zones 3–9.
Botanical Name: Hemerocallis 'Purple d'Oro'
Features: A reblooming variety with lavender-purple flowers and a green throat. It grows 18–24 inches tall and adds a pop of color to gardens.
Growing Conditions: Flourishes in full sun and tolerates a range of soils. Suitable for zones 3–9.
These varieties share common traits that contribute to their popularity:
Many popular daylilies, such as 'Stella de Oro' and 'Happy Returns,' are rebloomers, producing flowers multiple times during the growing season. This extends their ornamental value.
Daylilies have fibrous roots that help them withstand dry conditions once established, making them suitable for xeriscaping.
Daylilies are generally resistant to pests and diseases, though aphids and spider mites may occasionally be a concern. Proper spacing and air circulation minimize risks.
To ensure healthy growth and abundant blooms, follow these guidelines:
Daylilies prefer well-drained, slightly acidic to neutral soil (pH 6.0–7.0). Amend heavy clay or sandy soils with organic matter.
Water deeply once a week, especially during dry spells. Avoid overhead watering to prevent fungal issues.
Apply a balanced fertilizer (e.g., 10-10-10) in early spring and again after the first bloom cycle to support reblooming varieties.
Divide clumps every 3–5 years in early spring or fall to maintain vigor and prevent overcrowding.
