I've had two goes at establishing blue Meconopsis in my woodland area without success, the plants were bought as a batch from Parkers Wholesale identified as 'Blue Himalayan Poppy' without specifying a particular species. They flowered reasonably well in the first season, but failed to reappear the next year. The same happened with the second batch planted a year later. I have heard that these perennial poppies can have an annoying habit of behaving like biennials. Anyone had any experience of them or raising from seed?