A woody, drought-tolerant Mediterranean herb that delivers needle-like aromatic leaves year-round in mild climates and thrives on neglect once established.
Salvia rosmarinus · also called Garden rosemary, Compass plant
Windows are counted from the average date of your last spring frost.
Rosemary produces a continuous harvest of intensely flavored leaves from a single long-lived plant that asks for little water and no coddling. In frost-free gardens it functions as a permanent low shrub, eliminating the need to replant each season.
A little history. Native to the rocky coastal hills of the Mediterranean basin, rosemary was reclassified from Rosmarinus officinalis into the genus Salvia following molecular phylogenetic work published in 2017. It is a woody perennial subshrub that can live a decade or more under suitable conditions.
Either works — needs at least 12 inches of well-drained soil depth; raised beds and containers with drainage holes are ideal. In containers: 5-gallon pot minimum; 10-gallon preferred for multi-year growth. Space plants 24 inches (60 cm) apart.
Water deeply, then allow soil to dry almost completely before watering again — typically every 7–14 days once established. Water when the top 2 inches of soil are fully dry and leaves begin to look very slightly dull. Aim for about 1 inch per week in active growth; far less once established.
Once each spring as new growth begins; avoid feeding after midsummer. What to use: light application of balanced slow-release organic fertilizer or a thin layer of compost worked into the surface.
After flowering, cut stems back by up to one-third to maintain a compact shape and encourage bushy new growth. Never cut back into bare, leafless old wood — it rarely regenerates from there.
It's ready when harvest once stems are at least 8 inches long. Take tip growth with young, flexible stems — these carry the most flavor. The plant is ready to harvest lightly as soon as it is actively growing. Use clean, sharp scissors or pruners to cut stem tips 3–4 inches long, just above a leaf node (the point where leaves attach). Never remove more than one-third of the plant at a single harvest.
Fresh stems keep 1–2 weeks wrapped loosely in a damp paper towel in the refrigerator. Dry bunches upside-down in a warm, airy spot for 1–2 weeks; store dried leaves in an airtight jar away from light.
In climates with frost, mulch the root zone with 3–4 inches of straw after the first frost. In pots, move containers to an unheated but frost-free garage or shed. Resume normal care when new growth appears in spring.
Sage
Both are woody Mediterranean subshrubs that want full sun, lean soil, and long dry spells between waterings, so one irrigation schedule suits both. Grouping them keeps thirsty vegetables from forcing water onto rosemary's roots.
Thyme
Thyme stays low and shallow-rooted while rosemary builds a tall woody frame, so they share a dry sunny bed without crowding. Both tolerate the same sparse feeding and sharp drainage.
Lavender
Lavender asks for the same full sun, gritty soil, and infrequent deep watering, and its flowers extend the bloom season that draws bees to the bed. Space plants 24 inches apart so air moves freely between them.
Rosemary's resinous scent can make it harder for cabbage moths and cabbage root flies to locate broccoli, kale, and cabbage by smell, though the effect is modest under heavy pest pressure. Keep rosemary at the bed edge, since cabbages want far more water.
Green Bean
Gardeners have long set rosemary near bean rows, saying its strong scent throws bean beetles off the trail. Treat it as an old pairing rather than a proven one, and plant rosemary at the row's end so bean watering does not soak its roots.
Spearmint
Spearmint runs underground and will overrun the base of a rosemary shrub within a season, trapping moisture against the woody crown. Grow mint in a sunken pot or a separate container well away from the rosemary bed.
Basil
Basil wants rich soil and steady moisture, while rosemary declines in wet, well-fed ground. Sharing a pot usually means one of them is watered wrong, and rosemary is the one that rots. Grow them in separate containers.
A perennial — it holds its spot for years, so it sits outside the annual rotation.
Rosemary is a permanent planting, so it sits outside the rotation and needs no family gap. It is a moderate feeder that leaves behind a woody root mass; if you ever pull it, loosen the soil, add compost, and follow with any annual crop you like.
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