The ‘evergray’ santolina is cold hardy in our climate, but dislikes our wet winters. We prefer to grow this aromatic herb in pots and bring it indoors in autumn. Above, left: Santolina is also known as cotton lavender, because of its dense, whitish-gray foliage and strong fragrance; Right: A santolina topiary made from a dwarf form of the species.
A compact, woody plant of dry ground and stony banks, the Mediterranean santolina (Santolina chamaecyparissus) is cold hardy in our USDA Zone 7 gardens, but dislikes wintering over in wet soil; we prefer to grow it in pots and bring it indoors in autumn. Santolina’s slender stems are densely covered with short, thick, cottony leaves. This low-growing evergray species lends itself to shaping and shearing, and was widely used as an ornamental edging plant in Renaissance knot gardens. It’s also an excellent subject for topiary work, especially the dwarf form of the species, S. chamaecyparissus ‘Nana.’