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I notice quite a bit of correspondence on the forum about growing this species. The most recent from 2016 reported plenty of seedlings and was expressing concern only about the delay in producing true leaves but we just cannot get primary germination. Ten years ago we had no problems at Kerrachar (NW Scotland) but here in Sheffield we consistently fail despite obtaining seed from a variety of sources. Our technique is fundamentally the same though there are obvious differences of aspect and, perhaps, temperature (although mean January temperature is almost identical).Does anyone have any suggestions on improving germination rate. (We have high success rates with the majority of what we sow but this species is eluding us.)
I find that if sown right away they germinate well, the first true leaves coming perhaps 3 or 4 weeks after the cotyledons.
Does anyone have any suggestions on improving germination rate.