How to grow them
Sow a pinch of seed in a pot and plant out the whole clump. Divide big clumps every three years in spring.
Herbs
A clump at the end of a bed gives mild onion leaves for years, and flowers the bees adore.
Sow a pinch of seed in a pot and plant out the whole clump. Divide big clumps every three years in spring.
Snip leaves 3cm above the soil. The purple flowers are edible too.
What goes wrong
Cut affected clumps to the ground.
Good neighbours: Carrots, Gooseberries, Blackcurrants.