Rosemary
Rosemary is a sun-loving Mediterranean native whose piney, resinous fragrance is as much at home in the kitchen as in the garden border.
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Ancient Herb, Modern Garden Staple
Salvia rosmarinus - reclassified from Rosmarinus officinalis in 2017 - is a woody, evergreen shrub that has been cultivated for culinary, medicinal, and symbolic purposes for thousands of years. Its narrow, needle-like leaves are deep green on top and silver-gray underneath, releasing a bold, camphor-tinged fragrance when brushed.
Native to the rocky coastal hillsides of the Mediterranean, rosemary is remarkably drought-tolerant once established and thrives in lean, well-drained soils where heavier plants struggle. It ranges from compact mounding forms just 1-2 ft tall to upright varieties reaching 6 ft, with trailing cultivars well-suited to raised beds and walls.
Planting & care
Plant rosemary in full sun - at least 6-8 hours daily - in fast-draining, slightly alkaline to neutral soil. Container growing is an excellent option in colder climates, allowing you to overwinter the plant indoors. Space plants 2-3 ft apart to allow for good air circulation, which helps prevent fungal issues.
Water deeply but infrequently; soggy soil is rosemary's greatest enemy and will cause root rot quickly. Fertilize lightly in early spring with a balanced organic fertilizer - heavy feeding encourages lush but less flavorful growth. Prune after flowering to maintain shape, but avoid cutting back into old, woody stems as they rarely regenerate.
The Reclassification Worth Knowing
You may still find rosemary sold as Rosmarinus officinalis at most nurseries - both names refer to the same plant. The 2017 reclassification into the Salvia genus was based on genetic evidence, and Salvia rosmarinus is now the accepted scientific name. Don't be surprised if seed packets and plant tags haven't caught up yet.
How much sun does Rosemary need?
Rosemary grows best in full sun.
How often should you water Rosemary?
Give it about 0.5-1 in per week once established.
When is Rosemary ready to harvest?
Rosemary is usually ready in harvest sprigs year-round once plant is established; avoid cutting more than one-third at a time.