The purple allium 39gladiator39 is a giant ornamental onion it is ideal for adding interest to all garden schemes whether traditional or contemporary not only is it easy to grow it flowers from late spring until mid summer and is the perfect plant for attracting beneficial bees to the garden it is also an unusual and interesting addition to flower arrangements height 12m 404 ft41 supplied in 2 litre pots culinary information some parts of these flowers are edible click her