The Blue Salvia also known as Mealy-cup Sage blooms from June through October. Plant in full sun with moist, well-drained soil for this popular variety of Salvia. They are native to north America and are perennials however in some climates they are treated as annuals. Some varieties include, Salvia azurea grandiflora (Salvia Pitcheri) grows to 5 ft tall with Gentian blue flowers. Salvia Clevlandii native to San Diego grows to 4 ft., fragrant with blue flowers. Salvia Farinacea, 3 ft. with violet blue flowers. Salvia Leucophylla 2-6 ft. and blue flowers in May June.Salvia Patens or Genitan Sage grows to 2.5 ft. likes sun or part shade.