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Primula odontocalyx seems to be quite tough so far and a couple of plants outside have come through two winters, totally unscathed. In fact the first one to flower (5th March 2013) was growing in the coldest part of the garden. The one I showed a picture of is grown in a pot in the greenhouse under the staging during winter. In summer it will go outside in a partially shaded place. Compost is the usual JI + composted bark + grit.Jens Nielsen thinks that, coming from S. Shaanxi, it would grow in warmer/drier conditions than most Himalayan Petiolaris, so should be good for eastern Scotland.I note seeds were offered in SRGC seed exchange this year. My own plant set a few seeds which have germinated today. I think this is a promising new introduction that will become easily established in gardens.