Decorative White Dahlias are stunning, summer-blooming plants that feature large, fully double blossoms with broad, flat, or slightly wavy petals. Grown from tuberous roots (“bulbs”), they typically reach heights of 90 cm to 120 cm (3 to 4 feet) and thrive in full sun and rich, well-draining soil. [1, 2, 3, 4, 5]
Key Growing & Care Guidelines
- Planting: Plant the tubers in early spring (after all danger of frost has passed) about 10–15 cm deep, with the growing “eyes” pointing upward. [1, 2, 3, 4]
- Sunlight: They need 6 to 8 hours of direct sunlight daily to produce massive blooms. [1, 2, 3, 4]
- Watering: Water deeply 2-3 times a week, ensuring the soil remains moist but never waterlogged to prevent rot. [1, 2, 3, 4]
- Support: Taller varieties will require staking or support since the large white flowers can get heavy and be susceptible to wind damage. [1, 2]
- Maintenance: Deadhead spent flowers regularly to encourage continuous, prolific blooming from mid-summer through autumn
