Dahlia seed

Dahlias are the showstoppers of the summer garden — bold, beautiful, and endlessly varied. Our dahlia seed mix produces single-petalled blooms in a gorgeous range of colours: warm oranges, rich reds, soft pinks, creamy whites, and vibrant bi-colours. They're fast from seed, flowering within a few months of sowing, and they make spectacular cut flowers with a long vase life.

Growing dahlias from seed is one of gardening's great pleasures — every plant is slightly different, and the anticipation of seeing what colour each one produces is half the fun.

Why You'll Love Growing Dahlias from Seed

• Spectacular blooms: Bold, colourful single flowers in a wide colour range
• Fast from seed: Flowers within 3–4 months of sowing
• Superb cut flower: Long stems, long vase life, stunning in arrangements
• High germination rate: Reliable and rewarding for all skill levels
• Mixed variety: Every plant a surprise — no two exactly alike

Growing Guide

• Season: Sow in spring (August–October) for summer blooms
• Position: Full sun — at least 6 hours of direct sunlight daily
• Sowing: Start in seed trays indoors or direct sow after last frost; cover lightly with 5mm of soil
• Spacing: Transplant or thin to 30–45cm apart
• Watering: Keep consistently moist; water at the base to avoid fungal issues
• Harvest: Cut when fully open for the longest vase life; deadhead regularly to encourage more blooms

Wondering whether to grow dahlias from seed or tubers? Read our guide: Dahlia Seeds vs Dahlia Tubers: What Happens When You Grow Dahlias from Seed?