Rosemary

Growing Conditions

Growing Zones

Thrives in USDA Zones 7 - 11

Companion Planting

When to Plant

• Transplant

  Spring after last frost; or autumn in mild climates

• Harvest

  Harvest tips of young growth; never cut back into old wood

Organic Growing Tips

• Plant at the edges of vegetable beds to create an aromatic boundary that confuses and repels flying pests.

• Never overwater - rosemary is killed far more often by waterlogging than by drought.

• Mulch lightly with grit or coarse bark rather than rich compost — rosemary thrives in lean, well-drained conditions, and a light mulch around the base reduces soil splash and improves drainage without promoting the soft growth that invites disease.

• Propagate from cuttings in late summer to create free plants for hedging or companion planting.

Common Pests

• Aphids
• Rosemary Beetle
• Powdery Mildew
• Root Rot

Taxonomy

Kingdom

Plantae

Family

Mint family (Lamiaceae)

Genus

Salvia

Species

Salvia rosmarinus

Natural History

Rosemary was reclassified from Rosmarinus officinalis into Salvia rosmarinus in 2017 following phylogenetic studies confirming it sits within the Salvia clade rather than forming a separate genus - a revision that resolved a long-standing botanical ambiguity but surprised many gardeners accustomed to two centuries of the old name. The common name comes from the Latin ros marinus, "dew of the sea," naming the plant's native habitat on dry, rocky, salt-tolerant coastal cliffs and scrub from the Iberian Peninsula to the eastern Mediterranean. In the wild, rosemary grows on hot, sun-baked slopes where its narrow resinous leaves and woody stems reflect a classic Mediterranean drought adaptation. The Romans carried it throughout their empire and it was established in Britain by the medieval period, though its hardiness limit (roughly zone 7) meant it needed wall protection in northern gardens. A letter of 1338 from Henry Daniel, physician to Queen Philippa of Hainault, describes rosemary being sent as a gift to the English queen - one of the earliest dated references to its presence in England. Rosemary's connection to memory and remembrance is ancient: in classical Greek and Roman practice it was placed at both funerals and weddings, and by the time Shakespeare wrote Ophelia's line "There's rosemary, that's for remembrance" in Hamlet (c.1600) the association was already several centuries old in English culture. Hungary Water - considered the first modern alcohol-based perfume and said to have been prepared for Queen Elizabeth of Hungary in the 14th century - was essentially rosemary distilled in spirits, used for its fragrance and as a topical application for gout and joint pain.

Traditional Use

Rosemary is among the most thoroughly embedded aromatic herbs in Western culture, carrying roles in cooking, perfumery, ceremony, remembrance, and household medicine that stretch from ancient Rome to the present day with remarkable continuity.

• Classical Mediterranean - Leaves and flowering tips

  Dioscorides described rosemary in De Materia Medica around 65 CE as warming and useful for digestion and liver complaints - a characteristically humoral-era classification. Roman cooks used it extensively with lamb, game, and roasted meats, and Pliny the Elder noted its fragrance and its value as a bee-pasture plant. The Romans grew it in sacred gardens and used it in religious ceremonies, giving it an early sacred-and-culinary dual status that persisted through European history.

• Medieval Remembrance and Ceremony - Sprigs

  The association of rosemary with memory and ceremony was fully formed in medieval Europe. Sprigs were carried at both funerals and weddings - the same plant, the same gesture, marking the two passages of life. John Bradwardine's sermon for Edward III in 1347 mentions rosemary at funerals; Chaucer mentions it in The Knight's Tale. By the time Shakespeare's Ophelia distributes symbolic flowers in Hamlet around 1600, rosemary for remembrance was one of the most familiar plant-symbol associations in English culture. The reason for the memory association is speculative - classical writers connected its smell with mental clarity, and some modern researchers have investigated 1,8-cineole in rosemary oil for cognitive effects, though without clinical certainty.

• Hungary Water and Perfumery - Flowering tips

  Hungary Water is traditionally described as the first alcohol-based perfume in European history, said to have been prepared for Queen Elizabeth of Hungary around 1370 for her rheumatism. The original recipe - rosemary flowers steeped in spirits of wine - was widely reproduced in European pharmacopoeias and household receipt books from the 15th century onward. Whether the attribution to the Hungarian queen is accurate or legendary, Hungary Water spread across Europe as both a perfume and a topical preparation, and versions of it appear in household books through the 18th century. It established rosemary as a foundational note in European perfumery and laid the groundwork for later lavender waters and eau de cologne.

• Culinary and Household Aromatic Use - Leaves

  As a culinary herb rosemary is most strongly associated with Mediterranean meat cookery - lamb especially - where its essential oils tolerate and complement long roasting. Italian and Spanish cooking both use it extensively, and it appears throughout French regional cuisine. In the British household tradition rosemary was one of the standard "strewing herbs" used to freshen floor-rushes and repel insects, and it was planted near bee skeps because its early flowers provided important spring forage. John Gerard described multiple practical uses in his 1597 Herball, including hair care, and rosemary oil remained in the British Pharmacopoeia as an ingredient in liniments well into the 20th century.

Culinary rosemary leaves used in normal cooking quantities have a safe history spanning over two thousand years. Concentrated rosemary essential oil is a different matter - applied directly to skin it can cause irritation, and internal use of concentrated oil is not culinary-level exposure.

This information is provided for historical and educational purposes only and is not medical advice. Always consult a qualified healthcare professional before making decisions related to your health.

Morphology (Plant Structure & Identification)

• Root System

  Woody perennial roots that prefer sharp drainage and fail in soggy soil. Established plants tolerate drought better than wet feet.

• Stem

  Woody branching stems with gray-brown bark on older growth. New shoots are green and flexible, but plants should not be cut hard into bare old wood.

• Leaves

  Narrow evergreen leaves with rolled edges, dark green tops, pale undersides, and a strong pine-resin aroma when rubbed.

• Flowers

  Small two-lipped flowers in blue, lavender, pink, or white appear along stems and are highly attractive to bees.

• Fruit

  Produces small dry nutlets after flowering, though rosemary is usually propagated from cuttings for reliable traits.

Known Varieties

Common cultivars worth knowing

• Arp

  Cold-hardy upright rosemary selected for better winter survival.

  Best for: cooler regions

• Tuscan Blue

  Tall upright type with broad leaves and strong flavor.

  Best for: culinary use, hedges

• Prostratus

  Trailing rosemary with cascading stems and blue flowers.

  Best for: walls, containers

• Barbecue

  Upright variety with sturdy straight stems useful as skewers.

  Best for: grilling

• Spice Island

  Vigorous culinary rosemary with strong upright growth.

  Best for: fresh harvests