Dahlia are tuberous rooted perennials with pinnately divided leaves and showy flower-heads, double in many cultivars, in summer and autumn
Miniature-flowered Decorative dahlias have fully double flowerheads up to 10cm across, with flat or slightly incurved florets
'David Howard' is a half-hardy herbaceous perennial to 75cm in height, with dark, bronze-tinged foliage and bronze-orange, double flowers to 10cm across