Propagation
Sow fresh seed in boxes or directly to bed during summer or spring and it takes 5 to 6 months to flowering. Sow thinly and plant out when 50mm (2in) tall and discard any unwanted seedlings.

Space the plants 200mm (8in) apart and stockier plants produce more double flowers. Protect from direct sun for several weeks.

Botanic information
Leaf: The leaves are up to 150 mm (6 in) long and are narrow elliptical to linear, grey with green mid rib and slightly tomentose. The leaf base is broad and the margins are toothed towards the bottom of the plant.

Flower: The fragrant salverform flowers have 4-flat petals in a cross-shape and they are attached by a slender pedicle. The double flowers are up to 50mm (2in) in diameter and are available in a range of colours. They are arranged in terminal raceme that appears during spring.

Fruit: The silique is long and narrow with 2-lobes that are swollen or have horns. There are 600 to 700 small seeds per gram.