Salvia So Cool Pale Blue
Salvia So Cool Pale Blue
Salvia So Cool Pale Blue
Salvia So Cool Pale Blue
Salvia So Cool Pale Blue
Salvia microphylla 'Socool PB' (SO COOL™ PALE BLUE)
Sage
Impeccable. Very pretty blue. I have 3 of them now. They grow quickly and have become tall. Successful layering. Very satisfied.
Alain, 24/10/2025
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Description
Salvia 'So Cool Pale Blue' is a variety of shrubby sage that forms a small rounded and dense bush covered with very bright mauve-blue flowers, quite rare in this type of sage. This plant blooms continuously throughout summer if the soil does not dry out too much, delighting bees and gardeners. Its small light green aromatic leaves are more or less evergreen in winter. It is an excellent border plant that also grows very easily in a pot. Moderately hardy, it will need protection in cold regions.
Salvia 'So Cool Pale Blue' belongs to the large family of Lamiaceae, which offers gardeners many aromatic and ornamental plants (thyme, rosemary, catmint, agastache...). This variety comes from a group of salvias native to the mountains of Central America, which gives them a respectable hardiness of about -10°C (14°F). These salvias are woody: their stems harden and form wood, which will, however, be damaged by pronounced and prolonged frost. The foliage is semi-evergreen in mild climate, small and ovate, and deliciously aromatic, with hints of mint and lemon. This fragrance is particularly pronounced in hot and dry weather, and the essential oils often make the leaves a bit sticky.
Between May and October (or even longer if the weather is mild), the 'So Cool Pale Blue' sage produces numerous small two-tone flowers in a charming bluish-purple. The violet calyx enhances the flower colour. It will reach approximately 70 cm (28in) in all directions.
The origins of the 'So Cool Pale Blue' shrubby sage give it good adaptability to sunny, dry, and even limestone and rocky soils: it will grow without problems in a mild and sunny climate, but it is best grown in a pot in regions with a rainy and cold winter, allowing it to be brought inside as soon as frost is forecast. If you want to plant it outside in a cold region, remember to provide it with a well-protected location, sheltered from cold winds. Perfect in rock gardens, borders and pots, this sage will form beautiful associations with other similar plants such as Mirage Salmon or Mirage Violet, as well as with perennials like common marjoram, Tiny Jackpot eryngo, or grasses like beautiful feather grass and Bouteloua gracilis.
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Salvia So Cool Pale Blue in pictures
Flowering
Foliage
Plant habit
Botanical data
Salvia
microphylla
'Socool PB' (SO COOL™ PALE BLUE)
Lamiaceae
Sage
Cultivar or hybrid
Planting and care
Plant Salvia 'So Cool Pale Blue' after spring frosts in cold climates, in September-October in hot and dry climates. Plant it in light, ordinary, porous, rocky soil, even limestone, not too poor though to support its flowering. This plant prefers sunny situations or partial shade in hot climates. It requires regular watering in autumn and spring if the weather is very dry, in order to flower abundantly. In very poor soil, incorporate some well-rotted compost or leaf compost. Mulch it in winter, in the coldest regions, and protect it from the cold as much as possible. Place it in the warmest corner of the garden, in full sun, against a south-facing wall, on a rocky or sandy slope, in any substrate that does not retain moisture which would be fatal to it in winter. Under these conditions, it can withstand brief frosts of around -10°C (14°F). It thrives well in pots, allowing gardeners to store it away in winter.
This sage has no specific enemies or diseases.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.