Salvia ‘Indigo Spires’
Thought of as drought-tolerant shrubs in much of the West, this huge genus—the largest in the mint family—includes many species of shrubs and perennials that need moderate to regular water. In recent years, scores of new species and selections have appeared in Western nurseries, many tender varieties that are even being offered as annuals in cold-winter climates. All sages have square stems and whorls of two-lipped flowers, either distinctly spaced along flower stalks or so tightly crowded that they look like one dense spike; some species have branched inflorescences. Flower colors range from white and yellow through salmon and pink to scarlet and pure red, from pale lavender to true blue and darkest purple. A few sages have fragrant blossoms. Many have aromatic foliage.
Nurseries in the West offer nearly 100 species as well as dozens of selections and hybrids. Names are often confused; S. x jamensis varieties are often assigned to S. greggii; and S. nemorosa varieties are often interchanged with S. x superba and S. x sylvestris varieties.Salvia ‘Indigo Spires’
This shrubby perennial can build up to a sprawling 6–7 ft. by 10 ft., but is easily kept to 3–4 ft. tall and 2–3 ft. wide with support and selective pruning. Soft, silky, oval to oblong leaves (to 6 in. long near base of plant, shorter higher up) have a grayish sheen above, are white and woolly beneath. Narrow, twisted spikes of closely spaced, Í-in., violet-blue flowers can reach 3 ft. or longer. Blooms from early summer to frost (almost all year in mildest climates). Indigo calyxes are colorful long after blossoms fall. Excellent cut flowers. Top growth is damaged by frost.
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Usually big, rounded, billowy shrub to 20 ft. tall and wide. Bright green leaves are 3–6 in. lon...