Prized for its dusky purple foliage, award-winner Salvia officinalis 'Purpurascens' (Purple Sage) is a compact, semi-evergreen dwarf shrub or perennial with strongly aromatic, oblong, purple young leaves delicately maturing to silvery-green. In early summer, it sends up whorls of two-lipped, lavender-blue flowers on short, upright flower spikes. Enjoying both ornamental and culinary qualities, Purple Sage is a favorite of many cooks and gardeners for its unique flavor and lovely foliage. It…