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do you think these were planted, it sounds as if they were if they are in a park. Always debate about whether these fritillaries are native or not even the large populations in the countryside.
I'm not sure. They certainly look after them though... the whole area where they grow has been fenced off to form a "wild garden".
Lat/Lng: 52.062797, 1.155017
OS grid ref: TM163451