About
Salvia azurea, the blue sage, is a semi-evergreen, upright, bushy perennial with aromatic, green foliage and slender stems of sky-blue, lipped flowers from summer through to autumn. A rewarding and long-flowering sage for a sunny, well-drained border.
About the genus
Salvia, the sages, are annuals, biennials, herbaceous or evergreen perennials and shrubs with paired, simple or pinnately lobed, often aromatic leaves and two-lipped flowers in whorls forming spikes or racemes. An exceptionally diverse and popular genus for sunny, well-drained borders.
Growing conditions
SunlightFull sun, Partial shade
Soil typeChalk, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureMoist but well-drained, Well-drained
AspectEast-facing, South-facing, West-facing
ExposureExposed, Sheltered
UK hardinessH5
Plant details
Plant typeShrubs
HabitBushy
FoliageEvergreen, Semi evergreen
Height1-1.5 metres
Spread0.5-1 metres
Time to full height2-5 years
Suggested usesCity and courtyard gardens, Cottage and informal garden, Mediterranean climate plants, Wildlife gardens, Patio and container plants
Native toWC & S USA
FragranceFoliage
Care notes
CultivationWill grow well in soils that are moderately fertile and moist but well-drained preferably in full sun but will tolerate some shade. Once the plant is established it will require less watering.
PruningCut back flower spikes to prolong flowering
PropagationPropagate by division in spring and by semi-ripe cuttings in summer
Pest resistanceGenerally pest-free
Disease resistanceMay be susceptible to honey fungus (rarely), powdery mildews, verticillium wilt and foot and root rots