Oregano

Sun

Full sun; tolerates light shade, but growth becomes looser and flavour may be weaker.

Water

Low once established. Water young plants regularly, then let the soil dry between waterings; containers need more frequent checks.

Soil

Well-drained sandy, gravelly or loamy soil, preferably neutral to alkaline. Avoid waterlogged ground and heavy feeding.

Height

1-2.5 ft (0.3-0.75 m)

Spread

1-2 ft (0.3-0.6 m), spreading farther over time

Flowers

Summer to early autumn; clusters of small pink, purple-pink or occasionally white flowers.

Foliage

Small, opposite, oval green leaves, often softly hairy and aromatic when rubbed. Usually dies back in cold winters but may retain leaves in mild climates.

Growth

Moderate to fast

Care needed

Low

• Water newly planted oregano until rooted; avoid keeping established plants continually moist.
• Use a container or raised bed if your soil stays wet in winter.
• Feed sparingly; rich soil and heavy fertilising encourage soft, floppy growth.
• Keep damp organic mulch away from the crown; a thin gravel mulch suits well-drained beds.
• Divide crowded clumps every three or four years and remove unwanted seedlings or spreading shoots.

Pruning. In early spring, cut old stems back to healthy basal growth. Harvest shoot tips regularly, and trim after flowering to encourage fresh leaves or before seeds ripen if spreading is a concern.

Early spring

Cut back old stems and divide established clumps as new growth appears.

Spring

Plant in a sunny, freely draining position; harden off indoor-raised plants before planting out.

Late spring

Begin picking shoot tips once plants are growing strongly, leaving plenty of foliage.

Summer

Harvest stems just before flowering for drying, while leaving some flowers for insects.

Late summer

Trim spent flowers before seed develops if you want to limit seedlings.

Autumn

Remove unwanted spreading growth and check that winter rain can drain freely from beds and pots.

• Edge a sunny herb bed or kitchen garden where leaves are easy to harvest.
• Combine with thyme, sage and lavender in a gravel garden with shared drainage needs.
• Plant in informal cottage borders, where the small flowers soften paths and attract pollinators.
• Grow in a container near the kitchen to keep its spreading roots contained.

Garden styles it suits: Mediterranean, Cottage garden, Potager (kitchen garden), Herb parterre, Pollinator garden and Dry gravel garden.

Plant it with: Thyme, Common sage, Lavender, Rosemary, Yarrow and Catmint.

Wildlife: Flowers provide nectar and pollen for bees, butterflies and other visiting insects. Leave part of the patch unharvested to flower.

• Root or crown rot in wet soil: improve drainage, reduce watering and replace badly affected plants in a drier position.
• Aphids on tender shoots: wash them off with water and encourage ladybirds and other predators.
• Spider mites during hot, dry spells, especially under cover: rinse foliage and use insecticidal soap labelled for edible herbs if needed.
• Floppy growth and weak flavour in shade or rich soil: move to more sun, stop heavy feeding and trim back stretched stems.

Leaves are edible for people in normal culinary quantities. Oregano is listed as toxic to cats, dogs and horses; eating foliage can cause gastrointestinal irritation, including vomiting or diarrhoea where applicable. Concentrated oregano oil is much more hazardous than a small nibble of leaves and should not be given to pets.

Where it spreads. Can spread aggressively by short rhizomes and self-seeding, including in parts of the Pacific Northwest and northeastern United States and southern Canada. Keep it away from nearby natural vegetation and remove unwanted seedlings.

• Sweet marjoram (Origanum majorana)

  Usually has softer, greyer leaves and compact, knot-like flower heads. Its scent is sweeter and milder, and it is much less cold-hardy.

• Pot marjoram (Origanum onites)

  Usually has denser hairs and flatter, tightly packed clusters of white flowers rather than the looser, often pink-flowered heads of common oregano.

• Mexican oregano (Lippia graveolens)

  A frost-tender woody shrub with rougher, prominently veined leaves and small white flowers; it is not a true Origanum.

Origanum comes from Greek words traditionally interpreted as 'joy of the mountain', while vulgare means common.

Propagation. Divide clumps in spring or take non-flowering softwood cuttings in late spring or early summer. Sow seed in spring, barely covering it; seedlings vary in flavour and may not match a named parent plant.

Accepted botanical name

Origanum vulgare

In the US and Canada

Introduced in Canada and the lower 48 states.

Native range

Afghanistan, Albania, Algeria, Altay, Austria, Azores, Baleares, Baltic States, Belarus, Belgium, Bulgaria and Buryatiya.

Measured

Soil pH 7 to 7.5. Average height 41 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.