Plant guide:🌿 Rosemary
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⚠ ModerateBrowning, brittle needles � most often traced back to overwatering rather than disease.
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Leaves
Rosemary Turning Brown and Dying Back
Commonly affects: Salvia rosmarinus (Rosemary)
Sections of the plant, or the whole plant, turn brown and dry, with needles becoming brittle and falling off. New growth may stop appearing entirely on affected stems.
Potential Causes
- 1Root rot from overwatering, the single most common cause of rosemary browning
- 2Poor drainage keeping roots chronically wet
- 3Winter cold damage in exposed outdoor plantings below its hardiness range
- 4Powdery mildew or root disease weakening the plant from below
Solution Steps
- 1Check the roots first � if brown and mushy, follow root rot treatment and repot into fast-draining mix.
- 2Cut back dead, brown stems to healthy green growth to assess how much of the plant has actually died.
- 3If cold damage is suspected after a hard frost, wait until spring before giving up, since rosemary sometimes resprouts from the base.
- 4Move outdoor pots to a sheltered spot for winter in regions with harsh frosts.
Prevention Tip
Since browning in rosemary is overwhelmingly a watering and drainage issue, always check root health before assuming disease or pests are to blame.
