Dahlia 'Black Jack'

Also known as: Dahlia hybrids 'Black Jack'

Dahlia 'Black Jack' is a stunning, very tall Dahlia cultivar. The most prominent features of dahlia 'Black Jack' are certainly its exceptionally large, dark burgundy flowers with narrow, sword-like petals. The flowers are almost black in appearance, lending the cultivar its name. They can make for good cut flowers if the arrangement is large enough.

Scientific classification

Asters bellflowers fanflowers and allies

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Mid summer, Late summer, Fall

Bloom Time

80 cm

Plant Height

60 cm

Spread

Green

Leaf Color

20 - 38 ℃

Ideal Temperature

Care Guide for Dahlia 'Black Jack'

Every week

Water

Full sun

Sunlight

20 - 38 ℃

Ideal Temperature

Water: Dahlia 'Black Jack' thrives in moisture-rich environments, preferring consistently moist soil without waterlogging. Weekly watering ensures optimal growth. Mulching is beneficial for retaining moisture, reducing watering frequency, and enhancing flowering potential.

Fertilize: For dahlia 'Black Jack', balanced N-P-K fertilizers should be applied every 4 weeks during active growth to promote strong stems and bright blooms. Use diluted solutions and well-draining soil, and always water before fertilizing. Adjust feeding in winter for optimal health and vibrant foliage.

Pruning: Characterized by its dark, velvety blooms, dahlia 'Black Jack' benefits from early spring pruning to eliminate damaged stems and promote growth. Deadheading spent flowers and thinning overcrowded shoots improve air circulation, enhancing health and flower production while aligning with dahlia 'Black Jack''s growth cycle for vibrant displays.

Propagation: Dahlia 'Black Jack' features vibrant colors and prominent flowers, making it a standout in the dahlia family. For propagation, carefully separate tubers to maintain their health and vitality.

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Common Pests & Diseases

Flower wilting Flower withering Dark spots

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