About Dahlia
Dahlia pinnata, commonly known as Garden Dahlia, is a species of flowering plant in the daisy family. It is native to Mexico but has been widely cultivated for its striking and vibrant blooms. Dahlias feature a variety of shapes, sizes, and colors which make them popular in decorative gardens and floral arrangements. Typically, they grow between 2 and 4 feet tall and produce flowers from mid-summer until the onset of frost. Each flower is composed of a complex arrangement of petals that can be solid, bicolored, or variegated, adding delightful visual interest to any garden space.
Taxonomy
Properties & Requirements
How to care for Dahlia
Water
Water dahlias deeply once or twice a week, allowing the soil to dry out slightly between waterings. Over-watering or allowing the plants to sit in water can lead to root issues. During peak summer days, adjust watering based on soil moisture and weather conditions.
Light
Dahlias require full sun to bloom profusely. A minimum of 6 to 8 hours of direct sunlight is ideal. Locations with morning sunlight and afternoon shade can also be beneficial in hotter climates.
Nutrients
Dahlias benefit from regular fertilization during the growing season. Use a balanced, water-soluble fertilizer every 4 weeks starting from when the plants are about 6 inches tall until mid-summer. Avoid high-nitrogen fertilizers as they can promote lush foliage at the expense of blooms.
Temperature
Dahlias perform best in moderate temperatures and can handle short periods of heat. Ideal temperature range is between 60°F and 75°F (15°C to 24°C). They are not frost-tolerant, and care should be taken to protect or lift tubers before the first frost.
