Rosemary: Planting, Pruning and Watering for a Dense Plant
Short answer. Plant rosemary in spring, in full sun and very well-drained soil. Water while it establishes, then little. Prune lightly after flowering without cutting into bare old wood.
Rosemary belongs to heat, pale gravel and outdoor meals. It fails most often in soil that is too rich, shady or wet.
In a dry border, it naturally sits among water-wise plants.
The Chatelain Method
Observe light and drainage, diagnose heavy soil risk, correct by raised planting, then prevent ageing with small regular trims.
Rosemary calendar
| Task | When | Key point |
|---|---|---|
| Plant | March to May | Sun, drainage, no heavy compost |
| Water | First season | Let soil dry between soakings |
| Prune | After flowering | Cut young growth, not bare old wood |
| Harvest | All year | Pick evenly around the plant |
Poor soil, better rosemary
Rosemary prefers mineral, rather lean soil that does not stay wet in winter. In pots, mix compost with grit and avoid standing saucers. Too much feed creates soft growth with less scent.
Pruning for density
After flowering, shorten young shoots by about a third. Do not cut into bare old wood, which regrows poorly. A light annual trim is better than hard renovation.
Watering in pots
Established rosemary tolerates drought. In pots, monitor more closely because the root ball dries quickly, but keep drainage sharp. A blackened base often means too much water.
Harvesting scent
Pick short shoots in the morning when dry. The brighter and leaner the culture, the clearer the aroma.
Useful gear
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To avoid winter wet.
For a dry mineral mulch.
For neat aromatic pruning.
FAQ
Why is my rosemary drying out?
Often because roots have suffocated in wet soil, or because pruning cut too far into old wood.
Can rosemary grow in a pot?
Yes, in a drained pot, gritty mix and direct sun.
When should I prune rosemary?
Lightly after the main flowering, without cutting into bare wood.
Useful sources
Written and checked by the editorial team of Les Jardins d'un Chatelain.