Beard-tongue 'Onyx and Pearls' is an attractive perennial known for its striking foliage and elegant flowers. This cultivar features deep, almost black, glossy foliage that provides a dramatic contrast in garden settings. The plant produces tall, sturdy stems topped with clusters of tubular, white flowers with subtle hints of lavender. These blooms appear in late spring to early summer, attracting pollinators such as bees and hummingbirds. The overall appearance of 'Onyx and Pearls' is both sophisticated and eye-catching, making it a popular choice for ornamental gardens and landscapes.
- Height and Spread: Grows to a height of 2 to 3 feet (60 to 90 cm) and spreads about 1 to 1.5 feet (30 to 45 cm).
- Sunlight: Prefers full sun to partial shade. In hotter climates, partial shade can help protect the plant from intense afternoon sun.
- Soil: Thrives in well-drained soil. It can tolerate a range of soil types, from sandy to clay, as long as there is good drainage.
- Watering: Moderate water requirements. Once established, it is somewhat drought-tolerant, but regular watering will ensure optimal growth and flowering.
- Pruning: Deadhead spent flowers to encourage additional blooms and maintain a tidy appearance. Cut back the stems to the base in late winter to early spring to prepare for new growth.
- Fertilization: Not particularly heavy feeders; a balanced, all-purpose fertilizer in early spring can support healthy growth.
- Pests and Diseases: Generally resistant to pests and diseases, though proper spacing and good air circulation help prevent potential issues like powdery mildew.
- Hardiness: Hardy in USDA zones 3-8, making it suitable for a wide range of climates.