Overview
Rosemary Bonsai (Salvia rosmarinus / Rosmarinus officinalis) is a aromatic Mediterranean shrub with tiny leaves, blue flowers and rugged bark with age. It is best suited to literati, windswept, small bonsai and herb-themed displays. For UK growers, treat it as: Outdoor, with shelter from prolonged wet cold.
Placement
full sun and excellent airflow
Watering
allow the soil to dry slightly between thorough waterings; avoid constant wetness
Feeding and fertilising
feed lightly in spring and summer
Pruning and wiring
clip after flowering and trim soft growth; avoid cutting hard into leafless old wood
Repotting
repot every 2-3 years in a gritty free-draining mix
Propagation
cuttings root well
Pests, diseases and common issues
root rot in wet soil, dieback after severe pruning and winter cold in shallow pots