Dwarf shrubby perennial of the Ericaceae family, this cultivar is another hybrid derived from the Cassiope 'Askival' lineage, resulting from the cross between Cassiope lycopodioides and Cassiope wardii. The name Snow-wreath highlights both the whiteness of the flowers and their light garland arrangement around the stems at the time of flowering.
Like its close relatives of the same lineage, it forms a dense and branched cushion, with stems covered with closely overlapping, scaly, evergreen leaves of a dark green, giving the whole a fine and compact texture very characteristic of the genus. The height remains between 15 and 20 cm.
The flowers are delicate hanging bells, of pure white, borne on fine peduncles that insert along the stems regularly enough to create this crown effect evoked by the cultivar's name. The abundant flowering brightens the dark cushion in spring.
In its natural habitat, the parent species bloom from May to July depending on the altitude. In cultivation, flowering extends from April to May. It requires an acidic, peaty, constantly cool soil, well-drained on the surface, in semi-shade or filtered light, without limestone or drought. It is suitable for heather gardens and rock gardens in an Atlantic or mountain climate.