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The Daily Insight

Is ornamental oregano invasive

Author

Eleanor Gray

Published May 17, 2026

The common purple-flowered oregano, Origanum vulgare, brought to North America by European immigrants, is considered a highly medicinal plant. It’s also invasive and has naturalized in parts of the US and Mexico. The prettier ornamentals are much better behaved and will provide many years of delight in the garden.

Are oregano plants invasive?

In most climates, mints and other members of the mint family, which include oregano and all the balms, are very invasive. There are 2 reasons why: 1. This family’s roots are called rhizomes, and they can and will travel quite a distance underground.

Is oregano an aggressive plant?

Oregano is an aggressive plant that likes to spread and a bush of oregano can grow quite large if you allow it. The stems can also grow up to 2 feet high and will often lay down on the ground, particularly when the plant is young or in the shade. … Oregano is a satisfying herb for any gardener.

How big does ornamental oregano get?

Grows up to 8-10 in.tall (20-25 cm) and 12-14 in. wide (30-35 cm). Thrives in full sun in average, dry to medium, well-drained soils.

Where do you plant ornamental oregano?

Choose a site with full sun for best flower and bract formation, although the plants will do fairly well in partial sun. Soil should be well worked and have good drainage.

How do you keep oregano from spreading?

A herbicide product containing chemicals that affect only broad-leaved weeds controls established oregano in a lawn without harming grass, and a pre-emergent herbicide prevents oregano seeds from sprouting.

Which herb plants are invasive?

Some herbs become invasive, crowd other plants, and even take over a garden. Tansy (shown), catnip, comfrey, horseradish, lemon balm, hops, artemisia, all kinds of mint, and some other herbs spread aggressively via underground runners unless you control them.

Can you overwinter ornamental oregano?

We find it easy to overwinter ornamental oregano, with absolutely no care required, in a cold dark place. Regrowth begins quickly after plants are brought out into the light.

Is ornamental oregano poisonous to dogs?

Oregano plants are grown commercially to be cultivated for culinary uses, such as spices and herbal properties. … Although this spice is not very toxic, it may still cause intense digestive disturbances in your pet, including vomiting and diarrhea.

What herbs are not invasive?
  • Oregano. My favorite easy, herby ground-cover, oregano has spread via seeds and runners from a modest original planting to cover large swaths of my garden. …
  • Calendula. …
  • Garden Angelica. …
  • Lemon Balm. …
  • Comfrey. …
  • Bronze Fennel. …
  • Shasta Daisy. …
  • Mystery Sedum.
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What is ornamental oregano?

Origanum libanoticum, the Lebanese or hopflower oregano, has narrow, chartreuse, shrimplike bracts with small, protruding lavender flowers. … Courtesy of Jane Shellenberger. A colorful ornamental oregano contrasts nicely in the garden with silvery blue eryngium.

Can oregano be ground cover?

If you want a groundcover that cares for itself, looks lovely, blooms, attracts insects, helps prevent weeds, thrives in sunny and dry locations, and conserves moisture, then look no further than an oregano groundcover. As an added bonus, groundcover oregano smells delightful when crushed or walked on.

How do you prune ornamental oregano?

  1. Cut back the stems of the oregano plant using pruning shears to a height of 2 or 3 inches about six weeks after planting. …
  2. Deadhead ornamental oregano plants throughout the spring and summer to encourage the growth of new buds. …
  3. Prune oregano plants at least twice throughout the harvest season.

Is ornamental oregano Evergreen?

Valued for its long-lasting clusters of pretty flowers and attractive foliage, award-winning Origanum ‘Kent Beauty’ (Ornamental Oregano) is a semi-evergreen, bushy subshrub with trailing stems densely covered with small, rounded, silver-veined, blue-green, aromatic leaves.

Does oregano spread like mint?

If left alone, oregano, like mint, can spread rapidly. In other words, they spread like them. Even as seedlings, they can germinate before they come in contact with the soil. As a result, they can spread and quickly establish dominance over your garden.

What can I plant with oregano?

Oregano. In the garden: Good companion to all vegetables, especially those that are most susceptible to sap-sucking insects like aphids. Plant near peppers, eggplant, squash, beans, cabbage, broccoli, brussels sprouts, cauliflower, kohlrabi, and turnips, as well as strawberries.

Is oregano in the mint family?

The Labiatae, the 3,500 members of the mint family, include, beside mint, a number of herbs that are fundamental to Western cooking — thyme, marjoram, oregano, basil, sage, rosemary, savory — along with other ancient herbs with less culinary value, such as lavender, hyssop, lemon thyme, horehound, betony, catnip, lemon …

How far does oregano spread?

The plants will grow 1 to 2 feet tall and spread about 18 inches. Oregano makes a good companion plant for any vegetable in the garden.

Is the herb thyme invasive?

I must mention that most members of the mint family will become quite invasive if left to their own devices. Mint, oregano, pennyroyal and even thyme will spread through underground runners and can quickly take over the garden. They can be hard to remove as small bits of roots left behind can grow into full plants.

Is oregano a good cover crop?

Oregano makes a good ground cover. Oregano forms a walkable ground cover in areas that don’t get heavy traffic, such as in minor pathways and under fruit trees where pruning and harvesting only occur a few times per year. In fact, it makes a great living mulch in perennial gardens.

Why does my dog eat oregano?

Oregano Health Benefits for Dogs Oil of oregano contains antifungal properties that inhibit the growth of bacteria (oil is concentrated so use small doses). … Oregano is also rich in fiber. Teas made from oregano can soothe sore muscles and relieve upset stomachs.

Is Cuban oregano pet friendly?

If consumed moderately, oregano is safe for dogs and they can enjoy all its amazing health benefits. It can be used as a medicinal herb or as added nutrition to your furkid’s meal. But like most things, too much of a good thing can be a bad thing. If your dog consumed this herb in high amounts, it can become dangerous.

Is oregano safe for cats to smell?

Oils that contain phenol and monoterpene hydrocarbons have been found to be particularly toxic to cats. You should avoid using oils such as cinnamon, clove, thyme, oregano, citrus oils, pine oils, lavender, bergamot, tea tree, eucalyptus, and others.

Is ornamental oregano deer resistant?

(ornamental oregano) Plant in sun where it will be drought tolerant once established. Oregano flowers are highly attractive to pollinators. Excellent container plant! Deer resistant.

Can you cook with ornamental oregano?

A beautiful addition to the herb or ornamental gardens and perfect for cutting. Although some do, I do not cook with the laevigatum oreganoes, preferring to use the more choice culinary varieties of Oregano hirtum instead.

Should you let oregano flower?

When oregano plants flower it means that the plants have reached maturity and they’re ready to produce seeds. You can remove the flowers to prevent the plants going to seed too quickly or allow the plants to bloom and enjoy the beautiful flowers in your garden.

Why is my ornamental oregano dying?

A dying oregano is often because of damp soil due to over watering or slow draining soil which causes root rot. Oregano requires well draining soil and infrequent watering to thrive. Fungal pathogens thrive in damp soil which turn oregano leaves brown, black or yellow and result in a dying oregano.

Is Origanum vulgare edible?

Food and drink It’s probably best known as a pizza herb but can be used dried or fresh in tomato and lamb dishes, salads, grilled meats, stews and soups.

How do you dry ornamental oregano?

Ornamental oregano flower bracts dry easily and will last for several years. To harvest, Saso says to simply cut them in bunches and loosely tie them, hanging them upside down in a cool, dry place out of the sun. Or, if the stems are stiff enough, you can stand them up in a vase to dry.

Are chives invasive?

Even though it can spread aggressively by seed, the seedlings are relatively easy to remove when young (although they can be quite numerous, so weeding may take a lot of time). This plant can be invasive under some conditions, so should be planted with care. Grow garlic chives in full sun in well-drained soil.

Is Lavender an invasive plant?

Although lavender (Lavandula sp.) does not currently appear on any invasive species lists, I urge you to read When is a Guest a Pest? and plant any non-native species responsibly.