How to Grow and Care For Oregano Plants

Written By Jennifer Bruce

About Oregano

Oregano is a perennial herb native to the Mediterranean region. It is often used in cooking, particularly in Italian and Greek cuisine, and has a strong, pungent flavor. Oregano plants have small, oval-shaped leaves and produce small, white or pink flowers. They are easy to grow and can thrive in a variety of soil types, but prefer well-draining soil and full sun. They can be grown in gardens or in pots and can reach heights of up to two feet. Oregano is also known for its medicinal properties and has been used to treat a variety of ailments, including coughs, colds, and indigestion. Follow this step-by-step guide on how to grow oregano throughout its life cycle from seed to spice.

  • Origanum Vulgare

  • Great for Beginner Gardeners

  • 7-14 days

  • Last Frost (End of March)-June

  • 80-90 days

  • Toxic to cats and dogs.

Sunlight

Oregano plants prefer full sun, meaning they need at least 6-8 hours of direct sunlight per day. However, they can also tolerate partial shade, especially in hot climates. It is important to make sure oregano plants receive enough sunlight, as this will help them grow strong and healthy. They will also produce more flavorful leaves if they receive plenty of sunlight. In general, it is best to place oregano plants in an area of the garden that gets plenty of direct sunlight, or to provide them with artificial light if they are being grown indoors.

Humidity

Oregano plants prefer a humidity level of around 40-60%. Too much humidity can cause the plants to become susceptible to pests and diseases, while too little humidity can cause the plants to become stressed and stop growing. To maintain the correct humidity level for your oregano plants, consider using a humidifier or placing a tray of water near the plants to increase humidity, or using a dehumidifier or increasing ventilation to decrease humidity.

Watering

Oregano plants need to be watered regularly to keep the soil moist, but be careful not to overwater as this can cause the roots to rot. Water the plants deeply once or twice a week, depending on the weather and soil conditions. Make sure the soil is allowed to dry out slightly between waterings, as oregano plants do not tolerate wet or waterlogged soil.

Temperature

Oregano plants prefer a warm, temperate climate and will grow best in temperatures between 60-70°F. They can tolerate cooler temperatures, down to about 50°F, but will go dormant in very cold weather and will not grow until the weather warms up again. Oregano plants are not frost-tolerant and will be damaged or killed if exposed to freezing temperatures. It is best to plant oregano in the spring after the threat of frost has passed and to bring the plants indoors or protect them with a frost cover if frost is expected.

Soil Requirements

Oregano plants prefer well-draining soil that is rich in nutrients. A good soil mix for oregano plants would include a combination of compost, peat moss, and perlite or vermiculite. This will help the soil retain moisture while also allowing excess water to drain away, which is important to prevent the roots from becoming waterlogged. It is also important to make sure the soil pH is between 6.0 and 7.0, as oregano plants do not tolerate extremely acidic or alkaline soil. Adding lime to the soil can help raise the pH if it is too low, while sulfur can be used to lower the pH if it is too high.

Recommended Oregano Varieties

There are many different types of oregano, but here are four common varieties:

  1. Greek oregano (Origanum vulgare): This is the most common type of oregano and is native to the Mediterranean region. It has a strong, pungent flavor and is often used in Italian and Greek cuisine.

  2. Italian oregano (Origanum x majoricum): This variety is similar to Greek oregano, but has a slightly milder flavor. It is often used in Italian cuisine.

  3. Mexican oregano (Lippia graveolens): This type of oregano is native to Mexico and has a slightly sweeter, more citrusy flavor than other types. It is often used in Mexican and Southwestern cuisine.

  4. Marjoram (Origanum majorana): This is another type of oregano that has a sweet, slightly minty flavor. It is often used in French and Middle Eastern cuisine and is less pungent than other types of oregano.

Starting From Seed

Here are five steps for growing oregano plants:

  1. Choose a sunny location with well-draining soil. Oregano plants prefer full sun and well-draining soil, so make sure to choose a spot in your garden or container that meets these requirements.

  2. Prepare the soil by adding compost and other organic matter. Oregano plants prefer nutrient-rich soil, so adding compost or other organic matter will help the plants grow strong and healthy.

  3. Plant oregano seeds or seedlings. Oregano plants can be started from seeds or purchased as seedlings. If planting seeds, sow them about ¼ inch deep and keep the soil moist until the seeds germinate. If planting seedlings, make sure to gently loosen the roots before planting.

  4. Water regularly, but avoid overwatering. Oregano plants need to be watered regularly to keep the soil moist, but be careful not to overwater as this can cause the roots to rot. Water the plants deeply once or twice a week, depending on the weather and soil conditions.

  5. Fertilize the plants once a month. Oregano plants benefit from regular fertilization, so consider adding a balanced fertilizer to the soil once a month. You can also use compost or other organic matter as a natural fertilizer.

Companion Plants

Oregano can be grown alongside a variety of plants, as it is believed to have natural pest-repelling properties. Some good companion plants for oregano include tomatoes, peppers, and basil, as well as flowers such as marigolds and nasturtiums. Oregano can also be grown alongside herbs such as thyme, rosemary, and chives.

Harvesting

Oregano is typically ready to be harvested when the plants have reached a height of about 6-12 inches. The leaves can be harvested anytime during the growing season, but they will have the strongest flavor just before the plants flower. To harvest oregano, simply snip off a few leaves with scissors or a sharp knife. You can also harvest the entire plant by cutting it down to about an inch above the soil line. Oregano leaves can be used fresh or dried for later use.

Dehydration

Here are five steps for drying oregano:

  1. Harvest the oregano leaves: Snip off a few leaves with scissors or a sharp knife. Make sure to harvest the leaves when they are at their peak flavor, just before the plants flower.

  2. Wash the leaves: Rinse the leaves under cool water to remove any dirt or debris. Pat the leaves dry with a towel.

  3. Tie the leaves into bundles: Gather a few oregano leaves together and tie them into a bundle using a piece of twine or rubber band. Make sure the bundles are not too large, as this will make it harder for the leaves to dry evenly.

  4. Hang the bundles to dry: Find a well-ventilated area with low humidity, such as a basement or pantry, and hang the oregano bundles upside down using twine or a clothespin. Make sure the bundles are not touching and are not in direct sunlight.

  5. Dry the oregano: Allow the oregano to dry for about one to two weeks, or until the leaves are brittle. Check on the oregano daily and make sure it is not getting too dry or damp. When the oregano is fully dried, crumble the leaves and store them in an airtight container. Dried oregano will keep for several months in a cool, dry place.

Susceptible Pests & Diseases

Oregano plants can be susceptible to a variety of pests and diseases. Here are a few common ones:

Pests:

  • Aphids: These small, pear-shaped insects feed on the sap of oregano plants and can cause the leaves to yellow and curl.

  • Thrips: Thrips are small, slender insects that can damage the leaves of oregano plants and cause them to become distorted or discolored.

  • Whiteflies: These small, white insects can also feed on the sap of oregano plants and can cause the leaves to yellow and wilt.

Diseases:

  • Powdery mildew: This fungal disease appears as a white, powdery substance on the leaves and stems of oregano plants and can cause the plants to become stunted or die.

  • Verticillium wilt: This fungal disease causes the leaves of oregano plants to yellow and wilt and can eventually kill the plants.

  • Root rot: This is a fungal disease that can occur if oregano plants are overwatered or grown in poorly drained soil. It causes the roots to rot and can kill the plants.

Frequently Asked Question’s

  • According to the ASPCA, oregano is poisonous to dogs and cats and may cause stomach irritation, vomiting, and diarrhea.

    If you believe your furry friend consumed oregano, visit the ASPCA for more information or call a medical provider immediately.

  • Oregano is known to contain many antioxidant properties that can help treat yeast infections and other infections. Oregano also can help alleviate pain and improve inflammation.

    If you or any other person has a medical concern, you should consult with your health care provider or seek other professional medical treatment immediately.

  • Oregano is used in many dishes across the world. For starters, its a great addition for many tomato sauces and chicken dishes.

  • Yes, oregano is a perennial herb.

Jennifer Bruce
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