A guide to growing Salvias
Salvias are one of the most reliable and long-flowering groups of plants for summer gardens, offering colour, structure, and a steady stream of nectar for pollinators. They range from hardy perennial types to more tender shrubby forms, and they’ve earned their place in gardeners' hearts thanks to their ability to flower for months on end with very little fuss. Their upright spires and aromatic foliage make them especially valuable in sunny borders and containers.
Salvias are part of the mint family, which explains their square stems and often highly aromatic leaves. The foliage can be soft and slightly furry or smooth and glossy depending on the cultivated variety or species, and many release a herbal or blackcurrant-type scent when brushed against or warmed by the sun. Their flowers are usually tubular and arranged in upright spikes, making them perfectly shaped for bees and other pollinators to access nectar. Colours are wide-ranging, often with contrasting calyces (the outer part of the flower that protects the bud before it opens) that help extend the display even after the flowers fade.
Early summer colour
June is when salvias really start to come into their own, building momentum as temperatures rise and days lengthen. The flower spikes appear in shades of deep purple, near-black (Salvia discolor), rich blue (Salvia patens and Salvia guaranitica ‘Black and Blue’), vibrant red, pink and even near-white, depending on the species or cultivated variety.
Types such as Salvia nemorosa and Salvia × sylvestris form compact clumps with strong vertical flower spikes, while Salvia greggii and Salvia microphylla provide a looser, more continuous display right through summer into autumn. The flowers are held well above the foliage, giving a layered effect that works particularly well in mixed planting schemes. Once established, salvias will often flower in flushes, especially if lightly trimmed after each main bloom period.
Their long flowering season makes them invaluable in June borders when many spring plants have finished and summer perennials are still yet to shine. They pair well with ornamental grasses, achilleas and lavenders, adding both contrast in form and colour, and continuity across the planting scheme.
Choosing the right spot
Salvias perform best in full sun, where they can produce strong stems and abundant flowers. A warm, open position is ideal, particularly in well-drained compost or soil. They dislike heavy, wet conditions, especially in winter, so drainage is paramount to their success and recovery from winter dormancy (a period of inactive top growth).
In poorer soils, salvias will still thrive as long as drainage is good, though a light mulch or well-rotted organic matter in spring can help improve structure over time. Avoid very rich or overly damp soils, as this tends to encourage leafy growth at the expense of flowers and can shorten the plant’s lifespan.
In containers, salvias work particularly well, provided they are not sitting in wet compost or overly crowded with other plants that have higher water requirements (e.g. seasonal bedding plants). A gritty, free-draining mix works best, and pots should always have good drainage holes.
Position containers in the sunniest part of the garden, such as patios, courtyards, or south-facing walls, where they can benefit from reflected heat during the cooler months.
Shelter from strong winds is helpful for taller salvias, as the flower spikes can become top-heavy once fully in bloom. Good air circulation is still important to keep growth healthy and reduce the risk of mildew from taking hold in humid conditions.
Planting your Salvia
The best time to plant salvias is late spring to early summer, once the risk of hard frosts has passed and the soil has warmed. This gives them time to establish before winter, which is particularly important for more tender types.
When planting, ensure the rootball sits level with the surrounding soil, as planting too deeply can lead to poor growth and stem rot. Dig a hole slightly wider than the pot, loosen the roots gently if they are pot-bound, and backfill with the existing soil. Water well after planting to settle the roots.
For container-grown plants, choose a pot that allows room for root development without being excessively large, as this can lead to waterlogging. A 30-40cm (12-16in) pot suits most smaller salvias, while larger shrubby types may need something closer to 45-50cm (18-20in). A layer of grit at the base can help improve drainage further.
Once established, salvias are relatively drought-tolerant, but they will perform best with occasional deep watering during prolonged dry spells. Feeding is not essential in the ground, but a light liquid feed during peak flowering can help extend the display in pots.
Make a statement
Salvias are an excellent choice if you want long-lasting colour through the height of summer, especially in sunny, well-drained areas where other plants may start to fade. Their upright form adds structure, while their flowers bring continuous movement as bees and butterflies work through the spikes.
They are particularly effective in mixed borders where they can weave through grasses and perennials, or in containers where their extended flowering season provides reliable impact on patios and terraces.
A few well-known, reliable salvias include Salvia ‘Hot Lips’, with its distinctive red-and-white bicoloured flowers that often deepen to red in hotter weather, and Salvia nemorosa ‘Caradonna’, valued for its deep violet flower spikes held on near-black stems that give strong contrast in the border.
You could also try Salvia nemorosa ‘Ostfriesland’, a classic deep purple form with sturdy upright spikes that’s great for structure. Another good one is Salvia ‘Amistad’, a more tender but highly floriferous cultivated variety with large violet-purple flowers that flower for months in warm, sunny spots.
Whether used in bold drifts or as individual accent plants, salvias bring dependable colour and a long-lived, subtle but architectural presence that suits both traditional cottage themes and contemporary displays.
