Crocosmia are an Iris-like, cormous, perennial with erect, sword-shaped and veined leaves which emerge from corms.
These corms multiply vertically e.g. the oldest corm is dragged deeper into the soils by contractile roots allowing the new ones to stack on top.
They are grown however for their spectacular inflorescences of flowers in bright reds, oranges and yellow on a horizontal branched stem throughout summer and into autumn.
Crocosmia 'Citronella has fresh green, upright foliage and small, yellow flowers that seem almost luminous.
They are best planted en-masse in the middle of deep borders for best effect.