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.

 

Perennial

Evergreen, Low-growing, Aromatic foliage

Flowers: April – June (may produce some flowers into early autumn) Foliage: Year-round

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.