Dahlia ‘Decorative Giants Mix’ Seeds

Dahlia ‘Decorative Giants Mix’ (Dahlia variabilis). Specially selected for producing extraordinary, double-flowered blooms reaching up to 20–25cm across, this heirloom seed mix delivers the luxurious appeal of dinnerplate dahlias right from seed in their very first season.

Featuring a dazzling spectrum of brilliant colors—including velvet crimsons, sunny golds, soft blushes, deep purples, coral pinks, and striking bi-colors—these robust, fully double blossoms stand atop thick, sturdy stems. Excellent as dramatic focal points in garden beds and borders, 'Decorative Giants' are a cut flower grower's dream, supplying continuous, high-impact blooms for extravagant bouquets from mid-summer through autumn. As a bonus, each plant forms underground tubers that can be lifted, stored, and replanted for years of continuous beauty.

Features:

• Massive Dinnerplate Blooms: Produces spectacular, fully double flowers up to 20–25cm in diameter.

• First-Year Flowering from Seed: Blooms abundantly in its very first growing season without needing tubers.

• Vibrant Color Symphony: Rich medley of red, pink, yellow, orange, lavender, purple, and bi-color flowers.

• Premium Cut Flower Standard: Long, strong stems yield showstopping indoor arrangements and garden displays.

• Perennial Tuber Production: Generates tubers underground that can be divided and saved for future seasons.

• 40 seeds per pack 

Growing Information (Australia):

• Scientific Name: Dahlia variabilis 'Decorative Giants Mix'

• Plant Type: Tender Perennial (Grown as a warm-season annual in cooler climates)

• Growth Habit: Tall, bushy erect stems (Non-vining/Branching flowering shrub)

• Sowing Season:

  • Temperate/Cool (e.g., Victoria, Tasmania): Early Spring to Early Summer (raise seeds indoors 4–6 weeks before last frost; transplant out after frost danger passes).

  • Subtropical: Late Winter through Spring.

  • Tropical: Autumn through Early Spring (grow during cooler dry months).

• Sun Position: Full Sun (requires at least 6 hours of direct sunlight daily for robust stem development and maximum bloom size).

• Sowing Depth: 5mm–6mm deep.

• Plant Spacing: 45cm–60cm apart between plants.

• Plant Height: 100cm–120cm tall.

• Germination Temp: 18°C–23°C.

• Germination Time: 7–14 days.

• Seed to Bloom/Harvest Time: 100–120 days from sowing (blooms continuously until first autumn frost).

• Gardener’s Tip: Pinch out the main growing tip when plants reach 30cm tall to encourage branching and produce multiple long flower stems. Provide sturdy stakes or horizonal support netting early in the season to support the heavy dinnerplate flower heads. Deadhead spent blooms regularly to stimulate continuous flushes of fresh flowers through late summer and autumn.