Trees › Walnut | Fernor | Potted Image 1 of 1 Walnut | Fernor | Potted £35.00 An extremely frost tolerant and disease resistant walnut variety. A vigorous cropper producing excellent quality large nuts. Add To Cart Added! An extremely frost tolerant and disease resistant walnut variety. A vigorous cropper producing excellent quality large nuts. Fruit Tree pruning guide £5.00 Add To Cart