Dahlia pinnata
TAXONOMY
FamilyAsteraceae
GenusDahlia
Zone8
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Plants of the World OnlineABOUT
Dahlia pinnata, commonly known as the garden dahlia, is a tuberous geophyte native to Mexico. It belongs to the Asteraceae family and is known for its vibrant, large flowers that come in a variety of colors. Dahlias are popular ornamental plants and are often used in gardens and floral arrangements. They have a dormancy period during the winter months when the tubers are stored until the next growing season.
ALSO KNOWN AS
Coreopsis Crassifolia
Bidens variabilis
Coreopsis georgina
Dahlia
Dahlia astrantiiflora
Dahlia mexicana
Dahlia nana
Dahlia pinnata var. nana
Dahlia pinnata var. pinnata
Dahlia pinnata var. variabilis
Dahlia purpurea
Dahlia purpurea var. purpurea
Dahlia pusilla
Dahlia rosea
Dahlia royleana
Dahlia sambucifolia
Dahlia sphondyliifolia
Dahlia superflua
Dahlia variabilis
Georgia superflua
Georgia superflua var. flavescens
Georgia superflua var. lilacina
Georgia superflua var. pallida
Georgia superflua var. purpurea
Georgia superflua var. rubra
Georgia superflua var. superflua
Georgia variabilis
Georgina astrantiiflora
Georgina purpurea
Georgina rosea
Georgina superflua
Georgina superflua var. flavescens
Georgina superflua var. lilacina
Georgina superflua var. pallida
Georgina superflua var. purpurea
Georgina superflua var. rubra
Georgina variabilis
Georgina variabilis var. lilacina
Georgina variabilis var. pallida
Pinnate dahlia
OVERVIEW
VPDCalculate
WaterMoist
SoilLoamy
LightDirect Bright (6 Hours)
Temperature20° C
Humidity60%
GDD1,800
Dormancy3 Months
pH6.5
Pressure1,013 mbar
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DETAILS
Care Instructions
Dahlias require bright, direct sunlight for optimal growth and should be planted in a location that receives at least six hours of sunlight daily. They thrive in moderate temperatures and prefer a humid environment. Regular watering is essential, but the soil should be allowed to dry out partially between waterings to prevent root rot. Dahlias are best grown outdoors in a garden setting.Harvest
Dahlia pinnata tubers are typically harvested in the fall, after the first frost has blackened the foliage. To harvest, carefully dig around the plant to avoid damaging the tubers, then lift the clump out of the ground. Shake off excess soil and allow the tubers to dry for a few days in a cool, dry place. Once dry, store the tubers in a cool, dark, and frost-free location until ready to replant in the spring. Ensure that the storage area has good air circulation to prevent mold and rot.Soil
Dahlias prefer well-draining loamy soil that is rich in organic matter. The soil should be kept moderately moist but not waterlogged. Good drainage is crucial to prevent tuber rot. Adding compost or well-rotted manure can improve soil fertility and structure.Fertilizer
Dahlias benefit from a balanced fertilizer with a nutrient composition of 5-10-10 (N-P-K). Fertilize the plants every 4-6 weeks during the growing season to promote healthy growth and abundant flowering. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.Repotting
Dahlias are typically grown from tubers rather than being repotted. However, if you need to move them, do so in early spring before new growth begins. Carefully dig up the tubers, divide them if necessary, and replant them in a new location with fresh soil.Propagation
Dahlias can be propagated by dividing tubers or from cuttings. The best time to divide tubers is in early spring before planting. Each division should have at least one eye (growth bud). Cuttings can be taken from new shoots in spring and rooted in a well-draining potting mix.Pruning
Pruning is essential for dahlias to encourage bushier growth and more flowers. Pinch out the growing tips when the plants are about 12 inches tall to promote branching. Deadhead spent flowers regularly to encourage continuous blooming throughout the season.Toxicity
Dahlias are generally non-toxic to pets and humans. However, some individuals may experience skin irritation from handling the plant. It is always advisable to wear gloves when working with dahlias to avoid any potential allergic reactions.Additional
To ensure healthy growth, stake tall dahlia varieties to provide support and prevent them from toppling over. Mulching around the base of the plants can help retain soil moisture and suppress weeds. In colder climates, dig up the tubers after the first frost and store them in a cool, dry place until the next planting season.REVOLUTIONIZE YOUR PLANT CARE
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