Iris louisiana 'Black Gamecock' - Louisiana Iris, Pond Marginal Plant
Iris 'Black Gamecock' is a Louisiana iris hybrid, often sold as Iris louisiana 'Black Gamecock'. In early summer it produces velvety flowers of deep purple that look almost black, each with a gold flash at the base of the petals.
Black Gamecock at a glance
| Botanical name | Iris 'Black Gamecock' (Louisiana iris hybrid) |
|---|---|
| Common name | Louisiana iris |
| Plant type | Clump-forming iris; semi-evergreen in sheltered spots |
| Height and spread | Flower stems to about 70 cm (RHS range 50–100 cm), 50–100 cm wide |
| Flowers | Velvety deep purple, almost black, with a gold flash, June and July |
| Position | Full sun or part shade (flowers best in sun) |
| Soil | Reliably damp, rich, acid to neutral soil |
| Pond depth | 0–20 cm of water over the crown |
| Hardiness | RHS H4 – hardy in an average UK winter (-10 to -5°C) |
| Native to | Garden hybrid of North American irises (not UK native) |
Where to plant Black Gamecock
- A pond shelf with up to 20 cm of water over the crown
- Stream banks and wet ground beside a pond
- Bog gardens with rich, damp soil
Is Louisiana iris hardy in the UK?
It is rated RHS H4, hardy through an average UK winter to about -10°C.
How to plant and care for it
Plant from spring to late summer. It is a heavy feeder, so use aquatic fertiliser tablets in ponds. Cut off faded flower stems and remove withered leaves in autumn. Divide in late summer after flowering.
Is it poisonous?
Yes. Irises are harmful if eaten by people or pets, and the sap can irritate skin, so wear gloves when handling it.
Which size should I buy?
Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.
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