Aster King-Size Blue Seeds

A Bold Blue Statement in the Late Garden

The Aster King-Size Blue (Callistephus chinensis 'King-Size Blue') is a striking annual aster bearing large, fully double blooms in a rich, deep violet-blue — one of the most sought-after colours in the late summer and autumn garden. True blue is rare among flowers, and this magnificent aster delivers it in abundance, with long strong stems that make it equally at home in a cutting garden or a cottage border. A showstopper from late summer right through to the first frosts.

Why Gardeners Love It

• 💙 Large, fully double deep violet-blue blooms — a rare and striking true-blue colour that commands attention in any planting
• ✂️ Exceptional cut flower — long, strong stems and excellent vase life, stunning in mixed bouquets
• 📏 Grows 60–80 cm tall — ideal for cutting gardens, cottage borders, and mixed beds
• 🐝 Attracts butterflies and late-season pollinators — a valuable nectar source as summer winds down
• 🌱 Easy to grow from seed — reliable and rewarding for gardeners of all levels

Growing Tips for New Zealand

Sow seeds indoors in seed trays 6–8 weeks before the last frost, or direct sow in spring once soil has warmed. Transplant seedlings to 30–40 cm apart in a sunny position with fertile, well-drained soil. Asters prefer a neutral to slightly alkaline soil — add lime if your soil is acidic. Water regularly but avoid waterlogging. Pinch out growing tips when young to encourage bushy plants and more blooms. Performs beautifully throughout NZ, flowering from late summer into autumn.

What's in the Packet

Each packet contains 10 seeds of Aster King-Size Blue (Callistephus chinensis 'King-Size Blue').