Dianthus barbatus Monksilver BlackPerennial variety. Velvety-black flowers over black evergreen foliage. Neat shape. | Common name: Sweet William | | Flowering period: May to July. | | Growing conditions: Sun. | | Typical mature height: 14 inches ( 36 cms ) | | Hardiness: - to discuss further |  | This is an insect-friendly plant which gives bees and other insects easy access to nectar and pollen. | |
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