A compact, trailing form of rosemary, Rosmarinus prostratus ‘Boule’ creates a neat, rounded mound of aromatic evergreen foliage. Its cascading habit makes it ideal for growing in pots, rockeries, or over low walls. In late spring to early summer, it’s covered in soft blue flowers loved by pollinators. Like all rosemaries, it thrives in sunny, well-drained conditions and requires minimal maintenance once established.
Rosmarinus prostratus ‘Boule’, commonly known as Trailing Rosemary or Prostrate Rosemary, is perfect for adding evergreen structure, scent, and culinary value to the garden – particularly in smaller spaces.
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Perennial
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Evergreen, Low-growing, Aromatic foliage
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Flowers: April – June (may produce some flowers into early autumn)
Foliage: Year-round
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Scientific Name
Rosmarinus prostratus ‘Boule’ (now reclassified as Salvia rosmarinus, though still widely sold under the old name)
Synonyms
Salvia rosmarinus ‘Boule’
Common Name
Trailing Rosemary, Prostrate Rosemary
Origin
Cultivated form derived from Mediterranean species
Pruning Tips
Lightly trim after flowering to maintain shape and prevent woodiness. Avoid cutting into old wood, as it may not regrow
Wildlife Value
Excellent nectar source for bees and other pollinators
Positioning
Full sun in a sheltered, warm spot – ideal for pots, raised beds, and cascading over walls or banks
Water
Water regularly in the first year; drought tolerant once established. Avoid waterlogged conditions
Soil
Well-drained soil – prefers poor to moderately fertile conditions. Avoid heavy clay or overly damp areas
Food
Rarely needs feeding – too much fertiliser can lead to leggy growth and reduced flavour
Pet-safe
Generally non-toxic to pets
Sprouts Top Tips
Perfect for sunny windowsills, patio pots, or gravel gardens. Harvest small sprigs year-round for culinary use – the flavour is strongest just before flowering.
