Plant Focus: Salvia
A versatile, long-flowering genus with strong value for pollinators and naturalistic planting
Salvia is one of the largest genera in the mint family, Lamiaceae, with around 1,000 species found across temperate and tropical regions of the world. The genus includes culinary sage and a wide range of ornamental garden plants, many of which have become reliable staples in modern planting design. Most ornamental salvias are perennials or low shrubs, valued for their upright flower spikes, aromatic foliage, and very long flowering period.
The flowers usually appear in shades of blue, purple, pink, red or white, in spikes held above clumps of soft grey-green or deep-toned foliage. Most varieties begin flowering in late spring or early summer and continue into autumn, often producing a second flush if cut back after the first display. The foliage is aromatic when crushed, and in some varieties remains attractive through the winter months.
Salvia performs well across a wide range of planting styles. It is widely used in mixed borders, prairie planting, gravel gardens, herb gardens and Mediterranean schemes, and its drought tolerance and long flowering period make it well suited to commercial landscapes and low-input planting. Most varieties prefer free-draining soil and a sunny position, although some, such as Salvia uliginosa, will tolerate damper ground.
The genus is also one of the most valuable groups for supporting pollinators. Bees, butterflies and hoverflies feed on the open, tubular flowers from spring through autumn, and the long flowering period provides a steady food source over many months. For schemes designed with biodiversity in mind, salvia is a dependable inclusion.
Key Characteristics:
✓ Mostly perennials or low shrubs
✓ Spikes of flowers in blue, purple, pink, red or white
✓ Long flowering period from late spring to autumn
✓ Aromatic foliage in grey-green, green or purple
✓ Prefers full sun and well-drained soil
✓ Drought tolerant once established
✓ Highly attractive to bees and other pollinators
Did You Know?
The name Salvia comes from the Latin word salvare, meaning “to save” or “to heal”. The genus has been used in herbal medicine for centuries, and culinary sage (Salvia officinalis) was once one of the most important medicinal plants in Europe, valued for properties that ranged from soothing sore throats to preserving meat.
Salvia in landscaping
Salvia is widely used in landscape design for the combination of colour, vertical structure and ecological value it brings to a planting scheme. The upright spikes contrast well with mounding perennials and ornamental grasses, and the strong vertical form of many cultivars adds rhythm and movement to mixed borders and naturalistic schemes.
In commercial landscapes, salvia is particularly useful because of its long flowering display and low maintenance needs. Most varieties produce months of colour with very little intervention, and many are also drought tolerant once established. For projects where reliable seasonal performance matters more than constant care, salvia is a sensible inclusion.
Popular Salvia varieties we recommend
Salvia nemorosa ‘Caradonna’
Salvia nemorosa ‘Caradonna’
A clump-forming perennial with dark, upright stems and narrow grey-green foliage, producing tall spikes of deep violet flowers from late spring into mid-summer. The dark stems contrast strongly with the flowers and give the plant a distinctive sculptural quality. Ideal for the middle of a mixed border, prairie planting, or large drifts in commercial schemes. Prefers full sun and well-drained soil, and benefits from being cut back after the first flush to encourage a second flowering in late summer.
Salvia nemorosa ‘Adrian’
One of the few white-flowered cultivars of Salvia nemorosa, ‘Adrian’ forms compact clumps of grey-green foliage topped with slender spikes of pure white flowers from early to mid-summer. Its cool colouring lifts mixed borders and pairs well with stronger blues and purples, and it holds its shape well in large drifts in commercial planting. It prefers full sun and well-drained soil, and cutting back after the first flush encourages a second flowering later in summer.
Salvia nemorosa ‘Ostfriesland’
A long-established cultivar of Salvia nemorosa, ‘Ostfriesland’ forms compact clumps of grey-green foliage topped with dense spikes of deep violet-blue flowers from early to mid-summer. Its neat, upright habit suits the front or middle of a mixed border, and it holds its shape well in large drifts in commercial planting. It prefers full sun and well-drained soil, and cutting back after the first flush encourages a second flowering later in summer.
Salvia nemorosa ‘Adrian’
Salvia nemorosa ‘Ostfriesland’
Salvia microphylla
Commonly known as blackcurrant sage for the scent of its crushed leaves, this small evergreen shrub carries masses of flowers, usually in shades of red or pink, from early summer well into autumn. The small, mid-green foliage is aromatic, and the long flowering season makes it useful at the front of a border or in containers. It prefers a sunny, sheltered position with well-drained soil, and dislikes sitting in cold, wet ground over winter.
Salvia microphylla ‘Hot Lips’
A small shrubby salvia with red and white bicolour flowers, the proportions of which shift with the weather: cooler periods usually produce more white, warmer periods more red. The flowering season runs from early summer well into autumn, and the small, mid-green foliage is aromatic. Useful at the front of a border or in containers. Prefers a sunny, sheltered position with well-drained soil.
Salvia microphylla
Salvia microphylla ‘Hot Lips’
Salvia argentea
Commonly known as silver sage, this short-lived perennial is grown mainly for its large rosettes of silver-grey leaves, which are thickly covered in soft, woolly hairs. Tall branched spikes of white flowers appear in the second year, though the rosettes are often the main reason for growing it. It suits gravel gardens and the front of a sunny, well-drained border, and needs sharp drainage to come through a wet winter.
Salvia rosmarinus
Better known as rosemary, this aromatic evergreen shrub carries narrow, needle-like leaves and small pale blue flowers through spring, often with a second show in autumn. It is useful in herb gardens, gravel gardens and Mediterranean schemes, and copes well with dry, free-draining soil in full sun once established. Rosemary is a fairly recent addition to the genus: long known as Rosmarinus officinalis, it was reclassified as Salvia rosmarinus in 2017, after genetic studies confirmed it belonged among the sages.
Salvia officinalis ‘Purpurascens’
Commonly known as purple sage, this low evergreen shrub is grown for its soft, purple-flushed foliage, which is aromatic and holds its colour throughout the year. Small violet-blue flowers appear in early summer, and the plant is valued both as an ornamental and as a culinary herb. It suits herb gardens, gravel gardens and mixed borders where year-round foliage colour is wanted, and prefers full sun and well-drained soil.
Salvia argentea
Salvia rosmarinus
Salvia officinalis ‘Purpurascens’
How to grow and care for Salvia
Salvia is generally easy to grow, and most varieties perform well with very little intervention. Most prefer full sun and free-draining soil, although some species tolerate light shade or damper conditions. Heavy or waterlogged soil should be avoided, particularly for shrubby salvias such as Salvia rosmarinus and Salvia microphylla, which can suffer in wet winters and may not survive prolonged sitting in cold, saturated ground.
Planting is best done in spring, once the risk of frost has passed and the soil has begun to warm. Watering through the first growing season is important while the roots establish, after which most salvias need very little additional irrigation. A mulch of well-rotted organic matter applied in spring helps retain moisture and adds modest nutrients without encouraging overly soft growth.
Maintenance is straightforward. Perennial salvias such as Salvia nemorosa benefit from being cut back after the first flush of flowers, which often produces a second flowering later in the season. In late autumn or early spring, the entire plant can be cut back to ground level. Shrubby salvias should be pruned lightly in spring, once new growth begins, to maintain shape and remove any dead or damaged material.
Heavy feeding is not usually necessary. Over-rich soil can encourage soft, leggy growth that is more prone to disease and less likely to flower freely.
Pests and diseases
Salvia is generally a healthy and trouble-free plant. Most issues are linked to growing conditions rather than pest pressure, and a well-sited plant in free-draining soil usually performs reliably.
Powdery mildew can occasionally appear in dry weather or where plants are crowded. It usually causes minor cosmetic damage and can be reduced by improving air flow between plants and avoiding overhead watering.
Root rot may develop in waterlogged or poorly drained soil, particularly in winter. Choosing a free-draining position and keeping heavy mulches away from the crown of the plant helps prevent this.
Slugs and snails can damage young shoots in spring, although established plants are usually robust enough to outgrow minor damage. Capsid bugs may occasionally cause distorted growth on new shoots, but the damage is rarely severe enough to require treatment.
If you would like more information on the Salvia varieties we grow and sell, speak to the G Team today.