How to Grow Rosemary

Rosemary (Salvia rosmarinus) is a fragrant, woody perennial herb valued for its culinary uses and evergreen foliage. It thrives in full sun, well‑drained soil, and warm, dry conditions. This guide explains planting, germination, care, harvesting, and climate considerations suitable for all regions.

Where Should You Plant Rosemary?

  • Best location: Full sun; rosemary develops its strongest aroma and growth in bright, direct light.
  • Soil: Well‑drained, sandy or loamy soil; pH 6.0–7.5.
  • Moisture: Light, even moisture; rosemary prefers drier soil once established.

When Should You Plant Rosemary?

  • Start indoors: Begin seeds 10–12 weeks before transplanting; germination is slow and uneven.
  • Transplanting: Move outdoors once temperatures are warm and frost danger has passed.
  • Direct sow: Rare; rosemary is most commonly grown from cuttings or nursery plants.

How Do You Plant Rosemary?

  • Depth: Plant cuttings or nursery plants at the same depth they grew previously.
  • Spacing: Space plants 18–24 inches apart to allow bushy growth.
  • Quantity: Several plants ensure continuous harvest and allow shaping into hedges if desired.

Which Plants Grow Well With Rosemary?

  • Companions: Sage, thyme, lavender, and other Mediterranean herbs.
  • Avoid: Moisture‑loving plants that prefer richer soil.
  • Best pairing: Herbs that enjoy similar dry, sunny conditions.

How Do You Water and Feed Rosemary?

  • Watering: Water lightly; rosemary is drought‑tolerant once established.
  • Feeding: Minimal feeding required; too much fertilizer reduces essential oil concentration.

How Do You Care for Rosemary?

  • Support: No support needed; plants form sturdy woody branches.
  • Weeding: Keep beds weed‑free to maintain airflow and reduce competition.
  • Pruning: Trim lightly to encourage branching and maintain shape.

Can You Grow Rosemary in Containers?

  • Container size: Minimum 10–12 inches deep; rosemary thrives in pots with excellent drainage.
  • Winter growing: Possible indoors with bright light; rosemary adapts well to indoor conditions.

What Pests or Diseases Affect Rosemary?

  • Pests: Aphids, spider mites, and whiteflies.
  • Diseases: Root rot and powdery mildew; ensure good airflow and avoid overwatering.

How Do You Harvest Rosemary?

  • Timing: Harvest once plants are well‑established; flavor is strongest in warm weather.
  • Leaves: Snip sprigs as needed; regular harvesting encourages new growth.
  • Seeds: Rarely used; rosemary is most commonly propagated by cuttings.