Iris sibirica 'Tropic Night'
Genus: Iris
Species: sibirica
Variety: 'Tropic Night'
Plant Type: Herbaceous Perennial
Quickly growing into a bold clump of upright leaves, it bears lots of stems of lovely purple-blue flowers with contrasting throats in late spring and early summer. It thrives in any good soil that's not too dry, and is also happy as a marginal plant in a pond.