May be a bit late this year, but I have "gardening rights" on a sizeable bit
of damp ground in North Yorkshire just crying out for something spectacular
and I thought G. manicata would fit the bill. But I couldn't find any! Does
anyone know where I might find this plant for sale in North Yorkshire, Tyne
& Wear or Teesside?

Alternatively, I can buy seeds on line. Is it difficult to raise from seed?

Duncan