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Rosemary
Salvia rosmarinus
A Mediterranean-native evergreen aromatic woody subshrub long known as Rosmarinus officinalis (reclassified to Salvia rosmarinus in 2017 based on molecular phylogenetics). Highly drought-tolerant once established; pale-blue spring flowers; foliage harvested year-round in mild climates as the canonical Mediterranean culinary herb. Borderline-hardy in zones below 7 — overwintered indoors or treated as annual outside zones 8-10.
Evergreen woody subshrub with needle-like aromatic foliage
Care tips
•
Prioritize drainage over fertility — rosemary fails predictably in wet or heavy clay soils.
•
In zones 7 and colder, choose the cold-hardy 'Arp' cultivar or grow in containers that can be overwintered indoors.
•
Skip fertilization — rich soil produces leggy plants with reduced essential-oil concentration in the leaves.
Lifecycle
Planting
Plant in spring in well-drained sandy or gravelly soil in full sun. Drainage is load-bearing — root rot from wet soil is the primary failure mode.
Transplanting
Transplant at small container sizes when young; mature woody plants resent root disturbance.
Early growth
Water through first establishment season; once mature, drought-tolerant. Overwatering is the canonical rosemary killer.
Maturity
Mature plants reach 2-5 feet tall in zones 8-10; significantly smaller as annuals in colder zones. Trim regularly for kitchen use to maintain compact form.
Propagation
Easily propagated by softwood cuttings in early summer; named cultivars (Tuscan Blue, Arp cold-hardy, Barbecue upright) are vegetatively propagated.
Pollination
Self-fertile
Perfect mint-family flowers in spring whorls are self-fertile. Pale-blue flowers heavily worked by early-emerging bumblebees and honeybees — among the first reliable spring nectar sources in Mediterranean-climate gardens.
Plants don't grow alone
Nectar forage
Bee
Common eastern bumblebee (Bombus impatiens)
Nectar forage
Bee
European honeybee (Apis mellifera)
Rosemary honey is a recognized Mediterranean varietal.
For people
Edible
Rosemary is among the most-used Mediterranean culinary herbs — fresh or dried leaves flavor meat, bread, oil, vinegar, and herbal teas. Essential oil is used in aromatherapy + traditional medicine. Generally safe in culinary quantities; concentrated essential oil should not be ingested.
Edible parts
leaves, flowers
Culinary use
Fresh sprigs in roast meats (especially lamb), bread, infused oils, marinades, herbal teas. Dried leaves in spice blends (herbes de Provence). Edible flowers as a garnish.
Climate notes
•
NC State Extension lists Salvia rosmarinus for USDA hardiness zones 8a-10b. The cold-hardy cultivar "Arp" extends to zone 6b in protected sites.
•
Drought-tolerant once established; rot-prone in wet or poorly-drained soils. Site on sloped or raised beds where drainage is excellent.
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No significant pest or disease problems in well-drained sites; aphids occasional. Root rot is the canonical failure mode in heavy clay or chronically wet conditions.
In the designer
Growth over time
24-60" tall · 24-48" spread
Mature woody subshrub; long-lived in mild Mediterranean-climate sites.
Design roles: Border · Edible · Structure
Seasonal interest
Spring
Summer
Fall
Winter
Filled = the plant has seasonal interest · ▾ now = your current season
Appears in collections
+2
Collection · 6 plants
Mediterranean drought-tolerant edible
A low-water edible palette of culinary herbs + a hardy grape for hot dry sunny sites. Mediterranean-origin plants thrive on neglect; their primary failure mode is overwatering, not underwatering.
English lavender
Rosemary
Garden sage
Oregano
Common thyme
Fox grape
+6
English lavender
Rosemary
Garden sage
Oregano
Common thyme
Fox grape
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Rosemary (Salvia rosmarinus). Retrieved 2026, June 5, from https://plotwright.garden/plants/rosemary
Sources for every fact
Every fact on this page traces to a source. 18 fields cited — 18 source-backed.