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On the pictures it is a new H. japonica from this year.
These are all plants of the 'Forest Hybrid' series of H. nobilis var. japonica All were planted out in the garden and have survived the frosts of winter for several years.
Interesting to hear that they have survived outside in your garden. I can't grow H. japonica outside, they don't like the winters here. Maybe there are some hardier species involved in the 'Forest Hybrids' ?Your 'Schneeflocke is exquisite.
Leena, I don't think it is the cold that kills them, more likely it's the alternation of mild and cold spells when the plants have started to grow. The winters here are often mild and triggers the plants to early growth. Then we usually have really cold periods in February - April, often without any snow for protection. H. transsilvanica and H. nobilis have no problem with the late spring frost but the Japanese hepatica planted outside have all died after a year or two.
Gunilla, I can't grow Japanese Hepatica out in the garden, either. (Murdered one and gave up forever...)But these Forest Hybrids appear to be something else - they are quite hardy. We had -15 C (without snow) and they survived. And - what's more - they are fairly cheap. www.stauden-stade.de sells them for about 7 €. I looked the Forest Hybrids up in Andreas Händel's book. He says that the parentage of these plants is kept secret (by whom he doesn't say). He believes them to be F1 Hybrids between Japanese liverwort and European Hepatica nobilis or H. acutiloba. They are fertile but the offspring have smaller flowers and less intensive colours. He, too, says they are hardy in his garden (in East Germany where it is far colder than where I live).
A double Hepatica nobilis found in Gotland (Sweden).