Mexican mint (Coleus amboinicus)

Also known as: Spanish thyme, Indian borage, Cuban oregano

Coleus amboinicus is a succulent perennial plant in the Lamiaceae family, known for its aromatic leaves and use in traditional medicine and cooking.

In This Article

Care Tips Water Sunlight Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Mexican mint

Lifespan

Perennial

Images of Mexican mint

Quickly Identify Mexican mint

Identifiable by its thick, fleshy leaves with a strong, oregano-like aroma and serrated edges. The plant typically features a square stem common to members of the mint family.

Scientific Classification of Mexican mint

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Lamiales

Family

Lamiaceae

Genus

Plectranthus

Planting and Growing of Mexican mint

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Soil Type

Potting Mix, Peat Mix

Soil pH

6-7.2

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Mexican mint?

The optimal watering quantity for the Coleus amboinicus is about 200 milliliters each time. The key to watering this plant is remembering the principle that it's better to keep dry than to keep damp. This plant needs its soil to be kept moist but not overly wet. Overwatering can lead to root rot and other types of fungal diseases. Hence, moderate watering is recommended.

What are the symptoms of an underwatered Mexican mint? ›

What should I do if my Mexican mint is not getting enough water? ›

What are the symptoms of an overwatered Mexican mint? ›

How to save an overwatered Mexican mint? ›

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What Are the Sunlight Requirements for Mexican mint?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 4 to 6 hours

The ideal light range for Coleus amboinicus is bright but indirect light for the better part of the day. This encourages vibrant colors and lush growth, but also shields the plant from the possibility of sunburn.

Where can I place the plant for ideal light? ›

How do I measure the light? ›

What happens if the plant gets the ideal light? ›

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What Soil is Best for Mexican mint?

Soil type: Sandy loam, Loam, Clay soil

Soil PH: 6 ~ 7.2

Coleus amboinicus requires well-drained soil. Soggy, water-logged soil can lead to root rot and other fungal diseases. A well-drained soil allows excess water to escape preventing damage to the plant's roots and promoting healthier growth. This plant thrives in rich, fertile soil. Fertile soil provides the essential nutrients required for the plant's growth and development. Using compost or organic matter can improve soil fertility and promote vibrant foliage. Looseness and aeration of soil are important for the healthy root system. This allows the roots of the plant to easily spread and absorb nutrients and water effectively. More About Soil→

How to Fertilize Mexican mint?

Fertilizer type: Balanced

For Coleus amboinicus, typically 5 grams of general purpose liquid fertilizer per plant is applied once every two weeks. In the case of slow-release granular fertilizer, it's best to apply 10 grams per plant quarterly. More About Fertilizing Techniques→

How to Prune Mexican mint?

Pruning Time: Spring, Summer

Start by trimming the plant’s top, this will encourage it to become denser. Look for the point where a pair of leaves grow from the stem (a 'node') and cut just above it. For shaping, prune the side branches. Be sure to make your cut just above a node where a leaf joins the stem. New growth will emerge from this node. If there are any bare stems that lack leaves, prune them back to the base. Do so until only a small stub of the stem remains. This will facilitate more aesthetic growth. More About Pruning Techniques→

How to Propagate Mexican mint plant?

Propagate Time: Spring, Early summer

Select healthy, disease-free stems from the parent Coleus amboinicus. Cuttings should be 4-6 inches long and ideally should have a few sets of leaves on the top.

Fill the pot with the potting mix. Thoroughly water it before placing the cutting.

Remove lower leaves from the cutting, leaving only 2-3 sets at the top. Insert the cut end into the wet potting mix and firm the soil around the stem.

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How to Repot Mexican mint plant?

Repotting frequency: Every two years

Coleus amboinicus is best repotted in Spring or Summer when it is actively growing. Signs that it needs repotting include dull leaves, a lack of new growth, or roots peeking out from the bottom of the pot. Regular repotting will keep this plant healthy and thriving.

Choose a pot that has one or two sizes larger than its current one. Make sure it has good drainage holes, as Coleus amboinicus is susceptible to root rot. A terracotta or ceramic pot is ideal for this plant as they are heavy and prevent the plant from toppling over, and they also allow the soil to breathe.

Coleus amboinicus prefers a well-drained soil mix. You can use a premade mix designed for indoor plants, or create your own mix using equal parts of peat moss, perlite or sand, and garden soil. This type of soil provides good drainage and aeration for root health.

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Toxicity of Mexican mint

Is Mexican mint toxic to cat?

All portions of the Mexican mint (Coleus amboinicus) plant are deemed hazardous for cats, as exposure may result in toxicity that can range from mild to severe. If you notice your cat nibbling on this plant, it is advisable to consult a veterinarian. The essential oils found in the leaves can induce irritation and a burning sensation if your cat comes into contact with them. Moreover, ingesting the plant can lead to oral irritation, along with possible symptoms such as vomiting, diarrhea (which may be bloody), breathing difficulties, and muscle weakness or tremors.

Is Mexican mint toxic to dog?

Mexican mint poses a toxicity risk to dogs. If dogs accidentally or out of curiosity consume any part of this plant, they may experience poisoning. The entire plant—comprising leaves, stems, and flowers—harbors toxic compounds that can endanger canine health. Poisoning symptoms in dogs can manifest as gastrointestinal disturbances, vomiting, diarrhea, lethargy, or even more severe reactions, which will depend on the amount ingested and the specific sensitivity of the dog. It is essential for pet owners to keep a close eye on their dogs and restrict their access to mexican mint. If a dog is suspected of having ingested any part of mexican mint, it is critical to seek veterinary assistance promptly to ensure the best possible outcome for the affected pet.

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.

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