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PlantSnap
Plant Care
Garden dahlia
(Dahlia pinnata)
Also Known As
Garden dahlia, Show dahlia, Decorative dahlia
About This Plant
Dahlia pinnata is a species of flowering plant in the Asteraceae family. It is a herbaceous perennial native to Mexico and Central America. The plant has tuberous roots and produces large, showy flowers in a wide range of colors and shapes.
Plant Care Instructions
Outdoor Size Range
12-48 inches (30-122 cm)
Light Requirements
Dahlia pinnata requires full sun to partial shade. It needs at least 6 hours of direct sunlight per day to thrive.
Humidity Needs
Dahlia pinnata prefers moderate humidity levels. It can tolerate dry air, but it may benefit from occasional misting during hot and dry weather.
Fertilizing Schedule
Dahlia pinnata requires regular fertilization during the growing season. A balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium is recommended. Fertilizer should be applied every 2-3 weeks.
Pruning Guidelines
Dahlia pinnata requires regular pruning to promote bushier growth and more flowers. Deadheading spent blooms and cutting back leggy stems can help the plant produce more flowers.
Common Pests and Diseases
Common pests that may affect Dahlia pinnata include aphids, spider mites, and thrips. The plant may also be susceptible to powdery mildew and other fungal diseases.
Indoor Size Range
12-36 inches (30-91 cm)
Watering Schedule
The plant requires regular watering during the growing season. It should be watered deeply once or twice a week, depending on the weather conditions. The soil should be kept moist but not waterlogged.
Temperature Range
The plant grows best in temperatures between 60-70°F (15-21°C). It can tolerate higher temperatures, but it may require more frequent watering.
Growing Season
Dahlia pinnata grows best in the summer and fall months. It can be planted in the spring after the last frost date and will continue to bloom until the first frost of the fall.
Growing Difficulty Level
Dahlia pinnata is moderately difficult to grow. It requires regular care and attention, including regular watering, fertilization, and pruning.
USDA Hardiness Zones
Dahlia pinnata is hardy in USDA zones 8-11.
Did You Know?
Dahlia pinnata was declared the national flower of Mexico in 1963.
