Hemerocallis citrina, commonly known as the Citron Daylily or Long Yellow Daylily, offers a distinctive presence in garden settings. This herbaceous perennial is valued for its unique floral display and adaptability. Its straightforward cultivation requirements make it a favored selection for many gardeners.
Distinctive Features
The Citron Daylily showcases trumpet-shaped, lemon-yellow flowers, typically 6 inches (15 cm) in diameter. These blooms are notably fragrant, with a sweet, citrus-like scent that intensifies in the evening. A remarkable characteristic is its nocturnal blooming habit; flowers open near sunset and remain open until morning.
Flowering occurs from June through July, sometimes extending into August or September. The plant forms a thick clump of arching, blade-like, bright green leaves, up to 40 inches (100 cm) long. Flower stalks, or scapes, rise significantly above the foliage, reaching 3 to 4 feet (90-120 cm) tall. Originating from East Asia, particularly China.
Growing and Caring for Your Plant
Cultivating Hemerocallis citrina is generally uncomplicated, as it adapts to a range of conditions. The plant performs best in full sun, requiring at least six hours of direct sunlight daily for optimal flowering, though it tolerates partial shade. It thrives in well-drained, fertile soil, showing adaptability across various soil types, including heavy clay, and prefers a slightly acidic to neutral pH range of 6.0 to 7.0.
Regular watering is beneficial, particularly during dry spells and in its establishment phase. While it appreciates consistent moisture, allowing the soil to dry between waterings is advisable, and once established, it demonstrates tolerance to drought. When watering, apply water at the plant’s base to prevent disease. A balanced fertilizer applied monthly during the growing season can support vigorous growth, with a higher phosphorus content in early spring encouraging more blooms.
Hemerocallis citrina is considered a hardy perennial, exhibiting good resistance to many common pests and diseases. While generally robust, some minor issues like leaf streak, thrips, or slugs can occur, though the plant often shows good natural resilience. Propagation is most effectively done by division, typically in early spring or autumn, which also helps maintain plant vigor. Removing spent flowers and stalks after blooming contributes to the plant’s tidy appearance. This daylily is hardy in USDA zones 3 to 9.
Incorporating into Your Garden
The Citron Daylily’s stature and unique blooming cycle make it suitable for various garden applications. Its tall scapes and clumping foliage add vertical interest and texture, making it well-suited for perennial borders, mass plantings, or as an accent in cottage gardens. When planted in large groups, its vigorous growth can function as a tall ground cover.
Positioning Hemerocallis citrina near patios, windows, or walkways allows appreciation of its evening fragrance and blooms. Its lemon-yellow flowers and green foliage complement a variety of other plants, including ornamental grasses. Consider the plant’s height (flower stalks reaching 4 feet) and spread (clumps spreading 1.5 to 3 feet) when planning garden layouts. It can also be effectively used to mask the fading foliage of spring-blooming bulbs like daffodils.