Dahlia ‘Mountain of Fire’

Description

Dahlia ‘Mountain of Fire’ is a striking dahlia variety known for its vivid pillar-box red double blooms set against deep chocolate foliage. Reaching a height of 80cm, this eye-catching dahlia flowers from mid-summer until the first frost, adding long-lasting colour to garden beds and borders. Thriving in full sun and well-drained soil, Dahlia ‘Mountain of Fire’ is a must-have for any garden display. Follow this comprehensive planting guide to ensure a spectacular floral display.

PLANTING and AFTERCARE GUIDE

Best Planting Time

• Spring: The ideal time to plant Dahlia ‘Mountain of Fire’ is in spring once the risk of frost has passed. This allows tubers to establish strong roots before the growing season begins.
• Early Summer: Potted dahlias can be planted in early summer for an instant boost of foliage and blooms later in the season.

Site Selection

• Sunlight: Dahlia ‘Mountain of Fire’ flourishes in full sun, requiring at least six hours of direct sunlight each day to produce the most vibrant blooms.
• Soil: Well-drained, fertile soil is essential. Avoid heavy, clay-rich soil that retains excess moisture, as this can cause tuber rot. Amending the soil with compost or well-rotted manure enhances drainage and nutrient availability.

Planting Instructions

1. Prepare the Planting Hole: Dig a hole approximately 15cm deep and twice the width of the tuber.
2. Improve the Soil: Mix in compost or organic matter to boost fertility and drainage.
3. Planting Tubers: Position Dahlia ‘Mountain of Fire’ tubers with the eye (small growth bud) facing upwards, covering them with soil while leaving the top slightly exposed.
4. Spacing: Allow at least 40cm between plants to ensure proper air circulation and prevent overcrowding.
5. Watering After Planting: Water thoroughly to settle the soil around the tuber, but avoid overwatering at this stage to prevent rot.

Watering Requirements

• Growing Season: Water Dahlia ‘Mountain of Fire’ regularly, ensuring the soil remains moist but not waterlogged. Deep watering two to three times a week encourages strong root development.
• Hot Weather: During dry periods, increase watering frequency to maintain hydration. Always water at the base to prevent fungal diseases on the foliage.

Feeding

• Early Growth: Apply a balanced fertiliser when new shoots appear to support strong stems and foliage.
• Budding and Flowering: Switch to a high-potassium fertiliser, such as tomato feed, to promote abundant blooms throughout the flowering season.
• Mid-Season Boost: A second feed in mid-summer ensures Dahlia ‘Mountain of Fire’ continues to thrive and produce flowers until the first frost.

Staking and Support

• Tall Growth Habit: Due to its height, Dahlia ‘Mountain of Fire’ benefits from staking to prevent stems from snapping in strong winds. Use canes or plant supports early in the growing season.
• Tie Securely: Gently tie the main stem to the support with soft garden twine, allowing for some movement.

Deadheading and Pruning

• Regular Deadheading: Removing spent flowers encourages Dahlia ‘Mountain of Fire’ to produce continuous blooms. Cut back faded blooms just above a leaf node.
• Season-End Pruning: Once flowering has finished and the first frost blackens the foliage, cut back stems to ground level.

Overwintering

• In Mild Climates: A thick mulch layer (such as straw or bark) can protect Dahlia ‘Mountain of Fire’ tubers in the ground over winter.
• Lifting and Storing: In colder areas, carefully lift tubers after the first frost, dry them, and store in a cool, dry place until spring.

Final Tips

Dahlia ‘Mountain of Fire’ is a stunning addition to any garden, providing months of bold colour and lush foliage. By planting in full sun, ensuring well-drained soil, and following this care routine, you can enjoy a spectacular floral display from mid-summer to the first frost. Whether grown in borders, containers, or cut flower gardens, Dahlia ‘Mountain of Fire’ is a show-stopping choice that brings fiery vibrancy to any outdoor space.

 

RHS Details

See more Dahlias from Proctors