It is not widely grown in the United Kingdom.
I first heard about it Dan Pearson's book 'Sanctuary in the city' in which he talks of obtaining iris fulva from Piet Oudolf, the famous Dutch plantsman.
Ever since then I have been on the hunt for it.
It is frost hardy in Cambridge UK. I grow it both in large pots and in a shallow marshy area, both receive a lot of sun. Apparently these need a bit of spring sun and warmth to flower well.
They have reliably flowered for me with the most beautiful colours.
It normally flowers between spring and early summer, between April and June, with 1 or 2 flowers per axil of each alternate leaf along the stem. There can be as many as 4-6 (occasionally more) flowers per stem. The blooming period lasts for about 3 weeks.
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