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
