Dahlia Flower Bulbs - Cactus - Belmonte - 1 Bulb - Preorder for shipment mid to late September

📦 Pre-Order Notice: This product is available on pre-order. Bulbs will be dispatched between mid and end September 2026. Place your order now to secure your stock.

Dahlia Cactus – Belmonte | 1 Bulb

Bold, romantic, and breathtakingly beautiful — the Belmonte Cactus Dahlia is a variety that brings a rich, passionate drama to any garden. Its blooms are a deep, velvety rosy pink, with long, quilled petals that radiate outward in a spiky, star-like form that catches the light with every gentle breeze. Striking in character, generously flowered, and wonderfully rewarding to grow, this is a dahlia that turns heads and steals hearts from December right through to March.

A showstopper of the cactus dahlia group, Belmonte produces medium-sized, fully double blooms with tightly rolled, pointed petals arranged in a dramatic, spiky halo of deep rosy pink. Its upright, free-flowering habit and intense, jewel-toned colour make it an outstanding choice for garden borders, cutting gardens, and lush floral arrangements that bring instant romance and flair to any space. This listing includes 1 bulb of this captivating variety.

Growing Guide

Sun Exposure: Full sun
Planting Time: September – December
Flowering Time: December – March
Dormant Period: May – August
Lifting Time: July
Type: Tuberous root
Mature Height: 20 – 180 cm
Planting Depth: 8 cm (do not separate tubers from the clump)
Plant Spacing: 15 – 40 cm apart
Watering: Every 3–4 days, 10 minutes per session

Soil & Position

Dahlias thrive in well-draining soil. If your garden has heavy clay, incorporate sand and compost to improve drainage and aeration. A layer of mulch over the soil surface will help retain moisture between waterings. Select a position in full sun — they can tolerate midday shade, which also reduces their water requirements. When planting, ensure tubers are positioned with the growing points facing upward.

Care & Maintenance

Feed regularly with Hadeco Bulb Food to promote vigorous growth and abundant blooms. Taller varieties may require staking as they develop. Routine pruning encourages fresh growth, and pinching out the two side buds flanking the central bud will channel the plant's energy into producing one magnificent, oversized flower.

As the season draws to a close, yellowing foliage is entirely natural — remove it as it dies back. To lift bulbs for winter storage, cut stems approximately 5 cm above ground level in July and carefully lift the tuberous root. Well-nourished bulbs will yield a generous increase in tuber size and quantity around the crown. Keep roots completely dry during storage.

Should you observe deformed growth, stunted development, or mottled foliage, remove and discard the affected plant immediately — these are indicators of infection.