Black Jack Dahlia Plant

Black Jack Dahlia casts a spell in your garden with its striking 6-8 inch blooms, unveiling deep burgundy to near-black petals that twist into a spiky, semi-cactus shape against dark reddish-green foliage. This dramatic variety blooms steadily from midsummer to frost, adding a bold, velvety allure to borders, containers, and cut arrangements, supported by tall, sturdy stems.

And this dark star keeps the mystery alive. It pumps out those lush, near-black blooms all season with relentless swagger, thriving with just a sunny spot and a bit of care. Heat? It glows through it like a pro. Pests and deer? They spot this shadowy beauty and scamper off, outmatched by its bold charm.

Planting Instructions:

• - Plant tubers when soil reaches 60°F. Space them 4-6 inches deep with crown up and roots down

Soil Preparation:

• - Prefers well-drained, fertile soil

Watering Specifics:

• - Wait until green sprouts emerge from the soil before watering
• - Then water deeply 2-3 times per week, and daily if plants are in containers

Fertilizer Type:

• - Use fertilizers with a lower nitrogen count; half the amount of nitrogen relative to phosphorus and potassium (lower N on NPK ratio)
• - Fertilize every 2-3 weeks for containers and every 3-4 weeks for soil grown plants

Pruning and Training:

• - Pinch back the main shoot to encourage branching and more flowers
• - Deadhead spent blooms to encourage continuous flowering

Additional Pest Management:

• - Inspect regularly for pests like aphids, slugs, and snails

Temperature Tolerance:

• - Protect plants from early frosts with mulch or fleece covers to extend the flowering season

Overwintering:

• - After frost has turned the foliage brown, dig up tubers and store them over the winter
• - Clean tubers and let them dry for a few days in a frost-free location, then store in cool, dry place in slightly moist peat moss or sand