Salvia farinacea aka Mealy Cup Sage

Salvia farinacea, or mealycup sage, belongs to the mint family. This tender perennial comes from the south-central United States and northeast Mexico. Its range includes Texas and Oklahoma. It grows in prairies, plains, meadows, pastures, and woodland edges. Gardeners grow it as an annual where winters are too cold. Its long bloom season brings color from spring into fall.

Plants form dense, rounded clumps with upright, branching stems. Most garden plants reach 1–2 feet [0.3–0.6 metres] tall and wide. Some reach 3 feet [0.9 metres] in height. RHS lists a smaller upper size of 1.6 feet [0.5 metres]. The stems have a square cross-section. Fine white hairs cover the upper stems and flower calyces. These hairs give the plant its mealy name. Paired leaves have pointed tips and uneven, toothed edges. Their shape ranges from narrow oblong to lance-shaped or oval. The foliage can look green or silvery green. Leaves have fine hairs and a scent.

Small blue to purple flowers grow along upright racemes. Each flower has two lips, with a larger lower lip. The calyx forms a small cup below the flower. North Carolina State lists bloom from April through October. RHS reports flowers in summer and autumn. Bees, butterflies, and hummingbirds visit the flowers for nectar. After bloom, small brown fruits develop. Each fruit splits into four parts, each holding one nutlet. Goldfinches eat the dried fruits.

Grow mealycup sage in full sun for its preferred exposure. It also tolerates some shade. Give it moist soil that drains well and has moderate fertility. It accepts dry clay and withstands drought once established. RHS also lists sand, loam, and a broad pH range. Established plants need less watering. North Carolina State gives USDA zones 8–10; RHS rates it H3. Cut back spent flower spikes to extend bloom. Pruning also helps keep growth compact. Propagate by seed, stem cuttings, or spring division.

Use it in beds, borders, containers, and cottage gardens. Its firm flower stems suit cutting, and deer seldom damage it. Care needs are low, and serious pest problems are uncommon. Mildews, damping-off, wilt, and root rots can occur. Good drainage and air flow matter for plant health.