Skip to Content

How Tall Does Mint Grow? (Explained)

Sharing is caring! Spread The Love!

Last updated on September 23rd, 2022 at 03:09 pm

The usefulness of the height of a plant depends on you, the gardener. While some other gardeners might find tall plants helpful, you may prefer short or average-sized ones.

For example, you may most likely plant mint in your garden, not because of its height, but because of what you can use it for.

Nevertheless, you may still ponder, from time to time about how mint grows.

So, how tall does mint grow? Mint can grow anywhere from 4 – 48 inches depending on the variety of the mint, with most of them reaching a height of about 30 inches. However, most mint varieties reach a height of 12 inches. The height of the variety differs quite essentially, and the mint also tends to be pretty invasive, with some growing to a length of 18 – 24 inches outwards.

How Big Can a Mint Plant Grow?

The size of every plant, regardless of the variety, depends on the conditions surrounding its growth.

Under ideal conditions perfect for growth, the mint plant would grow to a height upwards of 12 inches and above on average, though this may depend on the variety of the plant.

The leaves of the mint are pretty average in size as compared to the leaves of most herbs.

The height of the mint isn’t precisely the entire problem; why the mint can get so prominent is due to its ability to spread over a wide area.

The mint is a pretty invasive plant, and it can spread and cover a relatively large amount of space.

Some gardeners use particular varieties of mint for ground cover. These mint species can reach about 18 inches wide and sometimes even more without trimming.

With proper spacing, suitable soil, and the right amount of nutrients, mint grows even more significant than it typically does.

How Do You Keep Mint From Growing Too Tall?

You may feel that your garden is bushy if your mint grows up to 30 inches.

Furthermore, you may most likely feel uncomfortable with it being that tall. Luckily, there are ways to control the height your mint reaches.

Firstly, the best way to stop your mint from growing too tall and spreading rapidly is by trimming off parts of the plant.

You can prune off the branches of the mint by cutting the tip of the stem, stopping after about two sets of leaves have been cut.

It would be best if you repeat this process every two weeks. It will prevent the mint from growing tall too quickly and keep it at a height you’d be comfortable with.

In addition, you can trim your mint with pruning shears without worrying too much about it. Because mint plants are pretty sturdy, they can withstand the cutting.

However, this does not mean that the pruning should be done without any regard for the plant.

You can also cut the mint plant again when it starts growing at first, repeating over and over for a while. This process forces the plant to take on a more compressed form, thus stopping it from growing taller.

Also, you can prevent your mint from growing too tall by cutting off the flower buds as soon as you see them beginning to sprout.

Many gardeners do this after pruning. This cutting is because it is more effective after the growth of the mint has been slowed down by injury.

In addition, it will allocate resources to healing those areas.

How Do You Keep Mint From Spreading?

Mint is notorious for its invasive tendencies as it spreads, covering a large amount of space after some time. This rapid spread can create unnecessary competition amongst the herbs in your garden.

You could let your mint spread because it is a ground cover plant that prevents soil erosion. Or you may just want to have an abundant supply of the herb.

However, if none of these is the case, having the plant spread over your entire garden may not be the most pleasant situation you would want to witness. And you may ponder on how to prevent it.

One of the most straightforward steps in preventing your mint from spreading is by planting them in containers. This acts to ensure that the mint is restricted in its growth for some time.

This, coupled with pruning, proves effective in dealing with the spreading tendencies of the mint plants.

Also, planting mint varieties that spread relatively slowly is very effective. Planting these varieties will drastically cut short the time you would prune when compared with traditional ones.

The best varieties for this option are the Corsican mint and Lemon mint.

Furthermore, you can prevent them from spreading by creating a barrier between the plant and the soil. You can do this by planting close to rocky surfaces or pavements.

You can also prevent the mint from spreading by planting crops that provide a root barrier to the mint.

Why Is My Mint not Growing?

From the soil type to even the amount of shade your mint receives, different conditions can affect the growth rate of your mint plant regardless of the variety.

Below are some of the reasons your mint may not be growing to your expectations:

1. Soil type:

The mint can survive under very different and diverse soil conditions, so soil type does not affect it a lot.

However, the best soil condition for mint growth is one with a neutral pH and good drainage.

Without the proper soil conditions, lack of nutrients, amongst other lousy soil issues, will hinder the growth of your mint a bit.

Growing your mint next to rocky surfaces or extremely sandy soil with barely any nutrients can be the reason why your mint is failing to thrive.

2. Water:

An average amount of water is ideal for the mint. Your mint may not be growing because of either underwatering or excessive watering.

Overwatering the herb is far more likely to happen than underwatering your mint. It is pretty hard to know your mint plant is not getting enough water as it can survive with a small amount of water.

A small amount of water is enough to keep your mint plant alive.

3. Temperature:

The mint can be affected by the weather conditions; however, this varies based on the variety of the plant. Most mint species need an average of 6 hours of sunlight, with some needing more or less.

4. Pests and diseases:

Pests and diseases may also be a reason why your mint is not growing.

Mint rust and verticillium wilt are two significant diseases most mint varieties face. Furthermore, pests like spiders, mites, and aphids hinder the growth of your mint.


The mint is a reasonably average herb growing to a max height of about 48 inches in some varieties. One main characteristic of the mint plant is its ability to spread rapidly, which can be troublesome.

However, if you set up specific barriers and prune your mint, you can contain it effectively.

Furthermore, mint is pretty easy to grow. Under the right conditions, you should have no problem increasing mint as it can be pretty independent.

Preventing the mint from growing too tall or spreading too wide is pretty easy to do, and with a small amount of dedicated time, you can do it quickly.


Sharing is caring! Spread The Love!