Scientific Name: Dahlia spp.
Common Names: Dahlia
Native to: Mexico, Central America, and parts of Colombia
Lighting Requirements: Full sun. Prefers bright, direct sunlight for at least 6 hours a day for optimal growth and blooming.
Height: 1 to 6 feet, depending on the variety
Width: 1 to 3 feet, depending on the variety
Winter Look: Typically dies back in winter in colder climates. In frost-prone areas, the tubers need to be dug up and stored indoors for the winter. In warmer zones, they can be left in the ground as perennials.
Seasonal Interest: Summer to fall, with blooms peaking in late summer to early fall. Known for their vibrant flowers in various shapes and sizes.
Drought Tolerance: Moderate. Requires regular watering, especially in hot weather, but does not like to sit in soggy soil.
Soil Requirements: Well-draining, fertile, and moderately rich soil.
pH Range: 6.0 to 7.0 (slightly acidic to neutral)
Hardiness Zones: USDA Zones 8 to 10 (grown as an annual in colder zones)
Deer Resistance: Low. Deer may be attracted to the tender leaves and flowers but usually avoid Dahlia if other food is available.
Attracts: Pollinators such as bees, butterflies, and hummingbirds.
Potential Issues: Susceptible to aphids, slugs, snails, and fungal diseases like powdery mildew and rust. Can suffer from tuber rot if planted in overly wet soil.
Notes: Dahlias are prized for their large, showy flowers that come in nearly every color of the rainbow and various shapes, including pom-pom, cactus, and dinnerplate types. They are often grown as cut flowers due to their vibrant colors and long-lasting blooms. Dahlias can be grown in borders, beds, or containers and are available in various sizes, from small, compact varieties to tall, bushy ones. Regular deadheading encourages more blooms, and they benefit from staking to support the taller varieties.