Salvia rosmarinus 'Tuscan Blue' (syn. Rosmarinus officinalis 'Tuscan Blue')
Light: Full sun; light afternoon shade is beneficial in Phoenix’s hottest exposures. Avoid intense reflected heat from west-facing walls.
Water: Low water once established; water deeply, then allow the soil to dry well between irrigations. Young plants and containers need more frequent watering, especially during extreme summer heat.
Soil: Very well-drained sandy or gravelly soil; tolerates alkaline soil. Use raised planting areas where drainage is poor, and keep the crown above standing water.
Mature size: 4–6 feet tall and 3–4 feet wide.
Bloom: Primarily late winter through spring in Phoenix, with occasional repeat flowering in cooler months.
Evergreen / deciduous: Evergreen.
Growth rate: Moderate; faster with good drainage and appropriate irrigation.