Oregano / Wild Marjoram

Origanum vulgare

description

Oregano is a sun-loving perennial herb with pungent savoury leaves.

benefits

Edible
Suitable for containers

How to care for Oregano

sunlight

Oregano grows on open, sunny slopes and dry grasslands, so give it the brightest spot you have. Strong light keeps the plant compact and helps the leaves develop their best flavour.

Full sun

A south or west-facing windowsill is ideal, with about 6 or more hours of direct sun daily. Outdoors, place it in an open, unshaded position. It can tolerate lighter conditions, but growth becomes looser and the flavour less intense.

If stems stretch and leaves are widely spaced, move oregano into stronger light or add a grow light.

watering

Let oregano dry slightly between drinks. Water thoroughly, then wait until the top 2-5 cm of soil is dry before watering again - constantly wet roots quickly lose their vigor.

Spring and summer

In a pot, this is often about every 4-7 days in warm, bright conditions. Check with a finger before watering; water until it runs from the drainage holes, then empty the saucer.

Autumn and winter

Growth slows in cooler, lower light, so watering may drop to roughly every 10-14 days. Let more of the pot dry and use its lighter weight as a cue before watering.

A small terracotta pot dries faster than a large plastic one, so use the soil check rather than a fixed schedule.

Do not leave oregano standing in water. Soggy soil can cause root rot and yellowing leaves.

humidity

Oregano comes from sunny, airy Mediterranean slopes, so it is happier in ordinary indoor air than in a humid room. Good airflow matters as much as humidity.

Preferred humidity

40-50%

Most homes at about 35-60% relative humidity are suitable. Briefly lower humidity is rarely a problem, but very dry heated air can cause leaf edges to turn crisp, new growth to stay small, and the pot to dry unusually quickly.

Raise humidity only if the air stays below about 30% and the plant shows dryness.

Use a small humidifier nearby, especially in winter.
Keep it away from radiators and hot air vents.
Do not mist regularly - wet foliage and stagnant air can encourage fungal problems.

temperature

Active growth

18-27°C (65-80°F)

Winter growth minimum

10°C (50°F)

Oregano comes from sunny, open parts of Europe and western Asia, so it enjoys warm days and good airflow. It can tolerate cooler weather and may slow down in winter, but keep indoor pots above 10°C (50°F) for steady leaf growth.

Place it near a bright window, but keep the leaves away from hot radiators and cold window glass.

nutrition

March - August

Feed about every 4-6 weeks while oregano is putting out new leaves. Use a balanced liquid herb or houseplant fertiliser at half strength on moist soil. Stop feeding in autumn and winter unless an indoor plant is actively growing in bright light.

Nitrogen

Nitrogen supports leafy growth, which is the part you harvest. A light, regular feed is enough - too much can make oregano soft, overly lush, and less intensely flavoured.

Use a weak feed rather than a strong one, especially for oregano growing in a pot with fresh compost.

soil

Lean, gritty, fast-draining soil

Oregano roots do best with air around them and dry out quickly after watering. Use a light potting mix loosened with perlite, pumice, or coarse grit, and avoid heavy, moisture-holding compost.

pH 6,0 - 8,0

This is neutral to slightly alkaline soil, which suits oregano well. A standard potting mix is usually suitable, especially if mixed with a little garden lime or grit when it is very acidic.

Choose a pot with drainage holes and do not let it sit in a saucer of water.