Mature size & growth rate

How big does Banana Mint (Mentha arvensis 'Banana') get?

Also called Banana Mint.

More about banana mint

About Banana Mint

Mentha arvensis 'Banana' · also called Banana Mint · herb

Banana Mint is a compact cultivar of corn mint with soft, fuzzy green leaves carrying a sweet banana-and-mint scent used in fruit salads, desserts and teas. Like all mints it spreads aggressively by runners and thrives in moist, rich soil with sun to part shade. Best contained in a pot.

Mature size: 25-40 cm tall, spreading indefinitely by runners

Indoor size vs how big it gets in the wild

Banana Mint stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect 25-40 cm tall, spreading indefinitely by runners. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

Banana Mint is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: light feeder. a balanced liquid feed every 4-6 weeks in the growing season keeps foliage lush; over-feeding dilutes the banana-mint aroma. refresh container soil yearly.

Want this turned into the right next pot at the right moment? The pot size calculator and the banana mint repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast banana mint grows.

How to keep banana mint smaller

You are not stuck with the maximum size. For banana mint specifically, these are the levers, in order of impact:

Divide the clump every year or two — splitting banana mint is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide banana mint out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow banana mint bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for banana mint the accelerators are:

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Good light plus regular feeding maximises offset and runner production.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

Light is almost always the ceiling. The banana mint light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When banana mint outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for banana mint:

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the banana mint repotting guide. If you want more of this plant instead of a bigger one, the banana mint propagation guide turns prunings into new plants.

Banana Mint size — frequently asked questions

How big does banana mint get?

Banana Mint reaches 25-40 cm tall, spreading indefinitely by runners when grown indoors. Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is banana mint slow or fast growing?

Banana Mint is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Banana Mint stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does banana mint take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep banana mint smaller?

Divide the clump every year or two — splitting banana mint is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make banana mint grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Good light plus regular feeding maximises offset and runner production. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.