Blue Sage Plant Care

Blue Sage (Salvia angulata) belongs to the Lamiaceae family within the Salvia genus. Blue Sage is native to the Caribbean coast from Panama through Colombia to Venezuela.

Blue Sage displays an upright, bushy shrub growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Blue Sage produces colorful spikes of tubular flowers in shades of blue, purple, pink, or red.

Leaf size: approximately 4 inches.

Water a young or newly planted Blue Sage every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Blue Sage thrives in full sun to partial shade.

Salvia angulata tolerates temperatures of 50–90°F. Blue Sage prefers humidity levels of 40–70%.

Well-draining sandy loam with added perlite for improved drainage. Good drainage is essential for Blue Sage to prevent waterlogging, which leads to root rot and fungal issues.

Feed Blue Sage every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun to partial shade and well-draining sandy loam with added perlite for improved drainage. Avoid low spots where water collects after rain.

Blue Sage is suited to USDA Zone 10b – 12b.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

Blue Sage can spread to about 2 ft (0.6 m) and reach about 3 ft (1 m) tall. Space plants about 2 ft (0.6 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the plant spacing calculator.

Prune Blue Sage while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the shrub in one year.

Blue Sage is frost-tender (hardy to USDA zone 10). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Blue Sage can be propagated through seeds, stem cuttings. Similar propagation techniques also apply to sage plant plant care, which shares the same genus.

See all plants toxic to cats and plants toxic to dogs.

Blue Sage is susceptible to aphids, spider mites, whiteflies. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Blue Sage grows outdoors in USDA Zone 10b – 12b. It survives winters down to planting zone 10b. Blue Sage is native to the Caribbean coast from Panama through Colombia to Venezuela. In cooler regions, grow Blue Sage as a houseplant or bring it indoors before the first frost.