When you’re trying to identify herbs in your garden or at the nursery, you might find several plants that look like mint. Many plants share mint’s square stems and aromatic leaves but offer different flavors and uses. This can lead to confusion, and sometimes, planting something you didn’t intend.
Knowing the difference is important for both gardening and cooking. This guide will help you spot the key features of true mint and its common look-alikes. You’ll learn to identify them by sight, touch, and smell.
Plants That Look Like Mint
The mint family, known as Lamiaceae, is huge and full of aromatic herbs. They often share similar traits, which is why so many get mistaken for common garden mint (Mentha). The most reliable feature to check first is the stem.
All true members of this family have square stems. If you roll the stem between your fingers, you can feel the distinct four-sided shape. This is a quick and easy first test when you’re unsure about a plant.
Key Identifiers For Mint Family Plants
Beyond the square stem, there are other characteristics to look for. These features will help you narrow down whether you have a mint or a relative.
Stem Shape and Structure
As mentioned, the square stem is the hallmark. It’s a trait shared by all its botanical cousins. This structure is a key evolutionary feature of the family.
Leaf Arrangement and Texture
Mint leaves typically grow in opposite pairs along the stem. They are often textured, with toothed or serrated edges, and a veined surface. The leaves are usually fragrant when crushed.
Flower Formation
Plants in the mint family usually produce clusters of small, two-lipped flowers. These blooms often attract bees and other pollinators to your garden, which is a great benefit.
Common Mint Look-Alikes
Here are some of the most frequent plants mistaken for mint. Some are close relatives, while others just happen to share a similar appearance. Careful observation will help you tell them apart.
Lemon Balm (Melissa officinalis)
Lemon balm is a very close relative and looks almost identical to mint at a glance. It has the characteristic square stem and similarly shaped, toothed leaves. The crucial difference is in the scent.
When you crush a leaf, it releases a strong, sweet lemony aroma instead of the cool scent of mint. It’s a wonderful herb for tea and cooking, but it’s not a substitute for mint in recipes.
- Identification Tip: Crush a leaf. If it smells like lemon pledge, it’s lemon balm.
- Growth Habit: Can be less aggressively spreading than some mints.
Catnip (Nepeta cataria)
Catnip is another member of the mint family that sports the square stem and heart-shaped, toothed leaves. The leaves are often covered in a soft, downy fuzz, which is a good visual clue.
Its smell is mildly minty but more earthy and pungent. Of course, if you have cats, their intense interest will give it away immediately. It’s sometimes called catmint, which adds to the confusion.
Purple Dead Nettle (Lamium purpureum)
This common wild plant, often considered a weed, has the square stem and leaves that can resemble young mint. However, its upper leaves often have a purplish tint, and the whole plant is typically shorter and sprawls along the ground.
It produces distinctive purple flowers. It’s not used culinarily like mint but has its own history in herbal remedies.
Ground Ivy (Glechoma hederacea)
Also known as “creeping Charlie,” this is an aggressive ground cover. It has round, scalloped leaves that grow on square stems, which is why it’s often confused. It spreads by long runners, much like mint.
The smell is unpleasantly pungent and bitter when crushed, not minty at all. It’s generally considered an invasive lawn weed rather than a useful herb.
Korean Mint (Agastache rugosa)
This plant looks like a taller, more elegant version of mint, with spiky flower clusters. The leaves are similar but often have a slight licorice or anise scent along with minty notes.
It’s a beautiful ornamental plant that is also used in teas. Its height and showy flowers help distinguish it from regular mint.
Horehound (Marrubium vulgare)
Horehound has crinkled, fuzzy leaves that are a dull gray-green color, quite different from mint’s typically bright green. The stem is square, but the whole plant has a woolly appearance.
It is famously used to make old-fashioned cough drops and has a very bitter taste. It’s not something you would use like mint in a mojito.
Plants That Are Not Relatives But Look Similar
Some plants mimic the mint look without being part of the family. They lack the square stem, but their leaf shape can be deceiving from a distance.
Nasturtium (Tropaeolum majus)
Nasturtium leaves are round and shield-shaped, which can sometimes be mistaken for certain mint varieties from a quick look. However, the stem is completely round and the plant has a vining or trailing habit.
The flowers are bright and edible, and the leaves have a peppery taste. They are easy to tell apart once you check the stem.
Some Varieties of Begonia
Certain angel-wing or cane begonias have asymmetrical, toothed leaves that might remind you of mint foliage. Their stems are often round or slightly angled, but never truly square like a mint’s.
They are grown purely as ornamental plants and their leaves are not aromatic. They are a common houseplant, so it’s good to know the difference.
Why Correct Identification Matters
Mistaking one plant for another can have several consequences. It’s not just about labeling your garden correctly; it’s about safety and success.
Culinary and Medicinal Use
Using the wrong herb can ruin a recipe or, in rare cases, cause discomfort. Lemon balm in a mint sauce will create a very different flavor profile. Some look-alikes, like certain weeds, are not edible at all.
If you are foraging or using herbs for teas, correct identification is absolutely essential. You should always be 100% sure of a plant’s identity before consuming it.
Garden Management and Invasiveness
True mint is notoriously invasive, spreading by underground runners. However, some look-alikes, like ground ivy, are even more aggressive and difficult to remove once established.
Planting something thinking it’s a mild mint, only to find it has taken over your flower bed, is a common gardening headache. Knowing what you’re planting helps you manage it properly, perhaps by using containers for aggressive spreaders.
Step-By-Step Guide To Identifying Your Plant
Follow this simple process when you encounter a plant you think might be mint. It will help you make a positive identification.
- Examine the Stem: Roll it between your fingers. Is it distinctly square? If round, it is not in the mint family.
- Check the Leaf Arrangement: Are the leaves growing in pairs directly opposite each other on the stem? This is a key mint family trait.
- Crush and Smell a Leaf: This is often the most telling test. Does it smell like classic spearmint or peppermint? Or is the scent lemony, earthy, foul, or like licorice?
- Observe the Growth Habit: Is it a tall, upright plant or a low ground cover? Is it spreading rapidly by runners?
- Look for Flowers: Note the color and shape of any blooms. Mint family flowers are usually small and clustered.
How To Control Mint And Its Invasive Look-Alikes
If you have confirmed you have mint or a similarly spreading plant, you might want to control it. Here are the best methods to prevent them from overtaking your garden.
- Container Gardening: The single most effective method. Plant mint in pots above ground or sink pots into the soil to contain the roots.
- Root Barriers: Install plastic or metal edging at least 12 inches deep around the planting area to block runners.
- Regular Harvesting and Pruning: Frequent cutting back of the tops and digging up of stray runners can keep the plant in check.
- Designated Area: Give mint its own separate, bordered bed away from other perennials where it can spread without causing problems.
Benefits Of Growing Mint And Its Look-Alikes
Despite their sometimes aggressive nature, these plants offer many advantages for your garden and home.
Culinary Versatility
Mint is fantastic in drinks, sauces, salads, and desserts. Lemon balm makes a calming tea, and catnip can be used for feline enjoyment or a mild herbal tea for people.
Pollinator Attraction
The flowers of mint, lemon balm, catnip, and Korean mint are highly attractive to bees, butterflies, and other beneficial insects. They support a healthy garden ecosystem.
Easy To Grow
Most of these plants are very hardy and low-maintenance. They often thrive in a variety of soil conditions and can tolerate partial shade, making them reliable growers.
Frequently Asked Questions
Here are answers to some common questions about plants that resemble mint.
What plant looks like mint but smells like lemon?
That is almost certainly lemon balm (Melissa officinalis). It is the most common mint look-alike with a strong citrus fragrance. It’s a lovely herb to grow for teas and cooking.
Is it safe to eat plants that look like mint?
You should never eat a plant unless you are completely sure of its identification. While many mint relatives like lemon balm and catnip are safe, others like ground ivy are not typically consumed and could cause stomach upset. Some ornamental plants are toxic.
How can I stop mint from spreading in my garden?
Planting mint in containers is the most effective solution. You can also sink pots without drainage into the ground or install deep root barriers around the planting area. Regular vigilance in pulling up runners is also necessary.
What is the difference between catnip and mint?
While both have square stems, catnip leaves are often fuzzier and its scent is more earthy and pungent than the refreshing scent of mint. Catnip also produces a unique intoxicating effect on most cats, which is a dead giveaway.
Are all square-stemmed plants edible?
No, this is a dangerous assumption. While many culinary herbs have square stems, so do some toxic plants. The square stem indicates membership in the Lamiaceae family, but it does not guarantee edibility. Always identify the specific plant before considering consumption.
Identifying plants that look like mint gets easier with practice. Start by always checking for that square stem, then let your nose guide you. By understanding the subtle differences, you can enjoy the right herb for your needs and manage your garden more effectively. Whether you want mint for your kitchen or are trying to remove an invasive look-alike, accurate identification is the essential first step.