Posted: 31/12/2014 at 14:58
I found this link but have to disagree with some points. My daughter lives in St Austell, home of english china clay, they grow rampant in her garden. I bought a pot and split it hers have done much better than mine, she is forever digging them out.
Mine are in acid moorland soil, they do well, I have moved some to around the new pond.
I never really worry about what should go where, just plant them in and off they go.
May have been a bit cold for yours up there, although mine have been covered with snow and frost and do well.
Just try them and perhaps a covering of leaves or compost next winter.