Growing Oregano

Also known as Pot Marjoram, Origanum vulgare is a perennial herb and a native of the Mediterranean region. The plant grows to over two feet tall and has oval grayish-green leaves that are frequently used in pizza, spaghetti and marinara sauces, plus many other Italian dishes. It also complements beef or lamb stews, gravies, salads, soups, even tomato juice. It’s small flowers can be lilac, pink, purple, or white.

Possessing medicinal properties dating back centuries, modern herbalists promote many potential health benefits and home-grown remedies derived from this most versatile herb.

Oregano needs only a moderately fertile soil to thrive in, though drainage and friability are important. Plant outdoors 12 inches apart after all danger of frost has passed. Plants are easily started from seed, stem cuttings, or mature root division.

Oregano appreciates being hoed regularly and neighboring weeds should be kept under control. Mulching with hay helps keep plants clean outdoors. Oregano lends itself well to container and hydroponic methods of cultivation.

When flowers appear, oregano is ready to be harvested, unless continuous picking of leaves during growth prevents flowering. About six weeks after planting, trim oregano shoots to within one inch of the center which will stimulate lush, bushy growth.

Growing Cultures

Outdoors, containers, hydroponics.

Plant Height

Oregano plants grow to a height of 12 to 18 inches (30 – 45cm).

Plant Spacing

Oregano plants should be spaced 12 to 15 inches (30 – 38cm) apart.

Preferred pH Range

Oregano will grow in a pH range between 6.0 (mildly acid) and 9.0 (strongly alkaline) with a preferred range between 6.0 and 8.0.

Propagation

Sow direct in spring when soil temperature is at least 65 degrees or or sow indoors six weeks before last frost.

Seed Germination Period

8 to 14 days.

Seeds Per Gram (Approximate)

3,800 to 4,500.

Soil Requirements

Well-drained, sandy, dry.

Alternative Growing Media

Soilless potting mixes, perlite, vermiculite, rockwool, coco peat, Oasis foam.

Time From Seed to Saleable Plant

Seeds to finished plugs, six weeks. Plugs to saleable plants, six weeks.

Sun & Lighting Requirements

Oregano grown outdoors prefers full sun.

Oregano will grow indoors satisfactorily under standard fluorescent lamps, and exceptionally well under high output fluorescent , compact fluorescent, or high intensity discharge (metal halide or high pressure sodium) plant growing lights. Keep standard fluorescent lamps between 2 and 4 inches from the tops of the plants, high output and compact fluorescents approximately one foot above the plants, and HID lights between 2 and 4 feet above the plants, depending on wattage. Have an oscillating fan gently stir seedlings for at least 2 hours per day to stimulate shorter, sturdier, and more natural plant habit.

USDA Hardiness

5a to 9b.

Water Requirements

Water on a regular schedule, do not overwater.

Potential Pests & Diseases

Whitefly, spider mites. Powdery mildew.

Special Notes

Drought tolerant, suitable for xeriscaping. Suitable for containers.