Mint
Mentha
The one herb whose main growing problem is that it grows too well. Mint spreads by underground runners and will colonise a bed within two seasons, which is why the standard advice is to confine it to a pot. It is also one of the few herbs genuinely happy in shade and in damp ground, which makes it useful exactly where the Mediterranean herbs fail.
- Position
- Partial shade or Full sun or Dappled shade
- Water
- high demand
- Drainage
- Moisture-retentive, Tolerates wet ground
- Grows to
- 30–90 cm × 100 cm
- Hardiness
- H6
- Harvest
- May to September
- Difficulty
- Straightforward
Described view
Pale thickened twisted mint shoots coming up in spring beside normal ones, with no rust pustules yet visible
August
Harvest
Mint’s year
Resolved for United Kingdom (general). Every window is stored against a climate event rather than a date, so a late frost pocket runs later than the band shows. What else August calls for.
| Activity | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Plant | March. | April. | May. | June. | July. | |||||||
| Harvest | May. | June. | July. | August. | September. | |||||||
| Divide | March. | April. | October. | |||||||||
| Dormant | January. | February. | December. |
Names that cause confusion
mint — A genus rather than a species, and the mints hybridise readily. Peppermint is Mentha × piperita, a hybrid; spearmint is Mentha spicata. Plants sold simply as 'mint' vary considerably in flavour.
Timing that travels
The band above resolves this plant's windows into months for one region. These are the windows themselves, stored against a climate event rather than a date — which is the form that survives being carried to a colder garden, a frost pocket, or next year.
- Plantfrom 4 weeks before to 12 weeks after your last spring frost
source
Sourced guidancehigh confidence
- Royal Horticultural Society: Mint — planting
Checked 2026-08-13
Almost always bought or divided as a plant rather than sown: named mints do not come true from seed.
What kind of herb this is
Herbs are a kitchen grouping rather than a botanical one, and the plants in it want opposite things. This is the one distinction that decides how to treat it.
Moisture-loving perennial herb
Growing regimesource
Sourced guidancehigh confidence
- Royal Horticultural Society: Mint — growing
Checked 2026-08-13
Wants damp ground and tolerates shade, which is the opposite of the Mediterranean set. Most will spread if allowed to, so the question is usually containment rather than establishment.
Treated the same way: chives, fennel, garlic chives, lemon balm, lovage, sorrel. The herb bed, split by regime
- Indoors
- Indoors spring to autumn
Where the indoor assessment comes from
- IndoorsSourced guidancemoderate confidence
- Royal Horticultural Society: Mint — growing indoors
Checked 2026-08-13
Almost any herb will sit on a windowsill in July. This is about whether it is still there in March, which is the part a pot on a supermarket shelf does not tell you.
What happens when it flowers
On a herb this is rarely a problem and rarely nothing. It is the point at which the plant stops being what you grew it for — by a lot, a little, or not at all.
source
Sourced guidancehigh confidence
- Royal Horticultural Society: Mint — harvesting
Checked 2026-08-13
Cut the whole plant back hard as it comes into flower and it regrows soft new leaves within a few weeks. Mint is the herb most improved by being cut down, and a plant left to flower and then go woody is the usual reason a second-year clump disappoints.
source
Sourced guidancehigh confidence
- Royal Horticultural Society: Mint — care
Checked 2026-08-13
What it is worth to pollinators
Recorded only where the evidence is specific to this plant, because “good for bees” attached to everything means nothing attached to anything.
- Nectar value
- high
source
Sourced guidancemoderate confidence
- Royal Horticultural Society: Plants for pollinators
Checked 2026-08-13
- In flower
- July, August, September
Picking it and feeding bees are not the same plan
Cutting mint back for leaf quality removes the flowers entirely. A clump left uncut in a corner solves it, and mint is vigorous enough that most gardens can spare one.
Conditions it needs
- Light
- Partial shade, Full sun, Dappled shade
- Direct sun
- 3 hours a day or more
- Frost
- Very hardy
- Hardiness rating
- H6 (RHS)
- Grows best at
- 15–25 °C
- Soil
- Loam, Clay, Peat-free compost, Silt
- Soil pH
- 6–7.5
- Drainage
- Moisture-retentive, Tolerates wet ground
- Water needs
- high
- Drought
- poor tolerance
- Waterlogging
- good tolerance
- Heat
- moderate tolerance
- Wind and exposure
- good tolerance
Where these figures come from
- LightSourced guidancehigh confidence
One of the most shade-tolerant culinary herbs.
- Royal Horticultural Society: Mint — position
Checked 2026-08-13
- Direct sunHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- FrostSourced guidancehigh confidence
Dies back to the ground in winter and reappears in spring.
- Royal Horticultural Society: Mint — hardiness
Checked 2026-08-13
- Hardiness ratingSourced guidancehigh confidence
- Royal Horticultural Society: RHS hardiness ratings
Checked 2026-08-13
- Grows best atHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- SoilHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Soil pHSourced guidancehigh confidence
- Plant Finder — Missouri Botanical Garden: Mentha
Checked 2026-08-13
- DrainageHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Water needsHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- DroughtHorticultural consensusmoderate confidence
Unusual among common herbs in genuinely wanting moist ground.
- Royal Horticultural Society: Mint — watering
Checked 2026-08-13
- WaterloggingHorticultural consensusmoderate confidence
- Plant Finder — Missouri Botanical Garden: Mentha
Checked 2026-08-13
- HeatHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Wind and exposureHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
On your soil
Computed by comparing this plant's recorded requirements against each soil's recorded characteristics. A recorded horticultural fact overrides the comparison where GrowingHQ holds one.
| Soil | Verdict | Why |
|---|---|---|
| Heavy clay | Prefers this soil | Mint is the herb that contradicts the herb rule. Where rosemary, thyme and sage want sharp drainage and rot without it, mint wants damp ground and thrives on heavy soil — which is also where it is most likely to run and take over, so it is grown in a sunken bucket regardless of soil. |
| Sandy | Works, with one condition | Mint will crop on sandy, but one thing has to be dealt with first. It has little drought tolerance and this soil dries out fast — it will check and bolt in the first dry spell without watering.Water and mulch will carry it through. On this soil the watering is not optional in a dry spell, which is the difference between a crop and a failure. |
| Chalky and alkaline | Works, with one condition | Mint will crop on chalky and alkaline, but one thing has to be dealt with first. It has little drought tolerance and this soil dries out fast — it will check and bolt in the first dry spell without watering.Water and mulch will carry it through. On this soil the watering is not optional in a dry spell, which is the difference between a crop and a failure. |
| Loam | Prefers this soil | Loam suits Mint as it stands: The pH suits it: it wants 6 to 7.5, and this soil is in that range. Loam is among the soils it is recorded as suiting. The soil holds moisture, which saves a great deal of watering. |
| Silty | Prefers this soil | Silty suits Mint as it stands: The pH suits it: it wants 6 to 7.5, and this soil is in that range. Silt is among the soils it is recorded as suiting. The soil holds moisture, which saves a great deal of watering. |
| Peaty and acid | Grows well here | Mint grows perfectly well on peaty and acid without special measures, though it is not the soil it would choose. |
| Shallow over rock | Works, with one condition | Mint will crop on shallow over rock, but one thing has to be dealt with first. It has little drought tolerance and this soil dries out fast — it will check and bolt in the first dry spell without watering.Water and mulch will carry it through. On this soil the watering is not optional in a dry spell, which is the difference between a crop and a failure. |
| Made ground and urban soil | Grows well here | Mint grows perfectly well on made ground and urban soil without special measures, though it is not the soil it would choose. |
Not sure which you have? Four hand tests will settle it.
Space and spacing
- Mature height
- 30–90 cm
- Mature spread
- 100 cmSourced guidanceDepends on conditions
- Rooting depth
- 30 cm
- Spacing
- 30–45 cm apart
Where these figures come from
- Mature heightHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Mature spreadSourced guidanceDepends on conditionshigh confidence
Applies when: Effectively unlimited in open ground: mint spreads by runners and the figure given is only what it reaches in a season or two before continuing.
- Royal Horticultural Society: Mint — spread
Checked 2026-08-13
- Rooting depthHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- SpacingSourced guidancehigh confidence
- Royal Horticultural Society: Mint — spacing
Checked 2026-08-13
In a container
- Minimum volume
- 5–10 litres
- Minimum depth
- 20 cm
Where the container figures come from
- Minimum volumeSourced guidancehigh confidence
- Royal Horticultural Society: Mint in containers
Checked 2026-08-13
- Minimum depthHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
The standard way to grow it. A pot sunk into a border keeps the runners in while letting the plant look like part of the bed.
Value to wildlife
Recorded only where the evidence names a resource and the months it is available. Most plants flower; that on its own is not what this section is about.
- Nectar
- A significant source
- In flower
- Jul, Aug, Sep
Where these figures come from
- NectarSourced guidancemoderate confidence
- Royal Horticultural Society: Plants for pollinators
Checked 2026-08-13
What keeping this costs
Cutting mint back for leaf quality removes the flowers entirely. A clump left uncut in a corner solves it, and mint is vigorous enough that most gardens can spare one.
Where and how you can grow it
Each way of growing is assessed separately, and “not assessed” is a real answer rather than a gap we have filled in with a guess.
| Method | Suitability | What it needs |
|---|---|---|
| Container | Well suitedsourceSourced guidancehigh confidence
Checked 2026-08-13 | 5 litres or more; Consistent moistureThe recommended way to grow it outdoors, precisely because it confines the runners. |
| Hydroponics | Well suitedsourceSourced guidancemoderate confidence
Checked 2026-08-13 | |
| Polytunnel | Well suitedsourceSourced guidancemoderate confidence
Checked 2026-08-13 | |
| Aquaponics | Well suitedsourceSourced guidancemoderate confidence
Checked 2026-08-13 | |
| Greenhouse | Well suitedsourceSourced guidancemoderate confidence
Checked 2026-08-13 | |
| Open ground | WorkableSourced guidanceDepends on conditionshigh confidenceApplies when: It grows extremely well and that is the problem: unconfined mint takes over a bed and is very difficult to remove afterwards, because every fragment of runner regrows.
Checked 2026-08-13 | A sunken container or a physical barrier |
| Raised bed | WorkablesourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | Confinement — a sunken pot rather than free planting |
| Windowsill | WorkablesourceHorticultural consensusmoderate confidence
Checked 2026-08-13 | Consistent moisture; A cool sill rather than a hot one |
| Vertical growing | WorkablesourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | Confinement is built in, which suits it. |
| Traditional dug bed | MarginalsourceHorticultural consensusmoderate confidence Only with a barrier; otherwise it becomes a weed. No external citation — see the evidence type above. Checked 2026-08-13 |
Growing it
- PlantingPlant in a container, or sink a bottomless pot into the bed. Mint spreads by runners just below the surface and will travel a metre a season through a border.
- PropagationDivide an established clump in spring or autumn, or root a cutting in water. Mint is among the easiest plants to propagate — a length of runner with a node will take.
- PruningCut the whole plant back hard after flowering to produce a fresh flush of young leaves, and cut back to the ground in autumn.
- WateringMint is one of the few herbs that genuinely wants moisture and it is the reason it is grown in a pot standing in a saucer while everything else is not. Keep it damp; a mint that dries out goes woody, mildews and loses its flavour, and cutting it hard back and watering is the way to recover it.
- FeedingA plant in the ground needs nothing. In a pot, which is where most mint lives, a liquid feed through the growing season keeps the leaves large, and repotting into fresh compost each spring does more than any feed — a season-old pot is a solid mat of rhizome with no compost left in it.
- HarvestingPick shoot tips rather than individual leaves and pick often — mint responds to cutting by branching, and a plant picked hard stays leafy while one left alone runs up to flower and turns woody at the base. Take the top third of a stem, cutting just above a leaf pair. Cut a whole potful back to a few centimetres in midsummer and it will produce a fresh flush of young leaves within a fortnight, which are better than anything on the old growth.
Where this guidance comes from
- PlantingSourced guidancehigh confidence
- Royal Horticultural Society: Mint — containing
Checked 2026-08-13
- PropagationSourced guidancehigh confidence
- Royal Horticultural Society: Mint — propagation
Checked 2026-08-13
- PruningHorticultural consensusmoderate confidence
- Royal Horticultural Society: Mint — pruning
Checked 2026-08-13
- WateringSourced guidancehigh confidence
- Royal Horticultural Society: Mint — cultivation
Checked 2026-08-13
- FeedingSourced guidancemoderate confidence
- Royal Horticultural Society: Mint — cultivation
Checked 2026-08-13
- HarvestingSourced guidancehigh confidence
- Royal Horticultural Society: Mint — harvesting
Checked 2026-08-13
Is it worth putting under cover?
Whether it will grow there is on the methods table above. This is whether the space is well spent, which is a different question and usually the one being asked.
| Structure | What protection is worth | What decides it |
|---|---|---|
| Greenhouse | No real benefitsourceGrowingHQ editorial positionmoderate confidence What protection is worth for this crop, judged against the same standard as every other record in this file.
Checked 2026-08-13 | Nothing. Mint grows anywhere with moisture and runs at the root, and putting it in a border under cover is how a greenhouse bed acquires a permanent mint problem.A pot, always — never a greenhouse border |
| Polytunnel | No real benefitsourceGrowingHQ editorial positionmoderate confidence What protection is worth for this crop, judged against the same standard as every other record in this file.
Checked 2026-08-13 | Nothing, and the same warning about a tunnel bed with more soil to run through. |
On a windowsill
source
GrowingHQ editorial positionmoderate confidence
How long the crop is actually productive on an ordinary British windowsill without added light.
- GrowingHQ editorial synthesis — GrowingHQ
Checked 2026-08-13
Growing it without soil
Nearly anything can be grown in a soilless system by somebody with enough equipment. The useful question is whether it is worth it, in which technique, and what goes wrong.
An established soilless crop. Grown this way commercially or routinely by home growers, with predictable results.
source
Sourced guidancemoderate confidence
- Purdue Extension — Purdue University: Hydroponic herbs
Checked 2026-08-13
Roots readily in plain water and grows enthusiastically. The problem is confinement rather than cultivation.
Techniques that suit it
- Deep water cultureRoots hang in aerated solution. Very productive and very unforgiving of solution temperature — warm solution holds less oxygen and root disease follows.
- Nutrient film (NFT)A shallow stream of solution runs over bare roots in a sloped channel. Cheap and productive for small fast crops; a pump failure kills a crop within hours because there is no reservoir at the roots.
- Ebb and flowA bed of inert medium floods and drains on a timer. The medium holds moisture between floods, which makes it far more tolerant of interruption than NFT.
source
Horticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Root space
- Vigorous and spreading. In a shared system mint will colonise neighbouring channels exactly as it colonises a border, so it is best given its own.
- Lighting
- Needs supplementary light
- pH band
- 5.5–6.5
Where these figures come from
- Root spaceHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- LightingHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- pH bandSourced guidancehigh confidence
Outside roughly this band, individual nutrients become unavailable even when they are present in the solution — which is why a crop can starve in a full reservoir.
- Purdue Extension — Purdue University: Hydroponic solution management — pH
Checked 2026-08-13
What actually goes wrong
- Taking over. The trait that makes mint a container plant outdoors makes it a nuisance in a shared reservoir, where roots travel between channels.
source
GrowingHQ editorial positionmoderate confidence
An operational judgement about running a mixed system rather than a claim about the plant.
- GrowingHQ editorial synthesis — GrowingHQ
Checked 2026-08-13
No nutrient recipes here
GrowingHQ records pH bands, which are measurable properties of nutrient availability, and deliberately records no EC or PPM targets and no mixing instructions. Published targets vary by cultivar, growth stage, water source and technique, and the figures that apply to your system are on the product you bought.
Harvesting
- When it is readyPick young shoots and leaves from late spring; flavour is at its best before flowering.
- How to pick itCut whole stems rather than stripping leaves, which encourages branching.
- Keeping itDries reasonably well, freezes better. Fresh stems keep several days in water.
Where the harvest guidance comes from
- When it is readyHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- How to pick itHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
- Keeping itHorticultural consensusmoderate confidence
No external citation — see the evidence type above.
Checked 2026-08-13
Keep picking
What goes wrong
| Problem | How often | Notes |
|---|---|---|
| Mint leaf beetle | commonsourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | A metallic green beetle that sits out in daylight, unlike everything else that holes mint. |
| Powdery mildew | occasionalsourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | In dry conditions and crowded pots. |
| Aphids | occasionalsourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | |
| Slugs and snails | occasionalsourceHorticultural consensusmoderate confidence No external citation — see the evidence type above. Checked 2026-08-13 | On new spring growth. |
What to look for
Views that settle something a description cannot. Where the photograph has not been taken yet, the description of what it will show is here instead — which is the useful half of it either way.
Described view
A mint plant lifted from a pot showing the dense mat of pale underground runners that make it spread
- The runners are the reason mint is grown in a container.
Grown with, grown after, grown instead
Every relationship states its mechanism. A pairing nobody can explain is a pairing nobody has checked, and it does not go in.
- Alternative toOreganoBoth are Lamiaceae used as culinary herbs, but they suit opposite conditions: mint for damp shade, oregano for dry sun. A grower whose herb bed has both situations should split them rather than treating either as a general-purpose herb.
source
Sourced guidancehigh confidence
- Royal Horticultural Society: Herb growing
Checked 2026-08-13
Safety and edibility
- Legal requirementGarden mint is not a listed invasive species in the UK and may be grown freely, but statutory guidance is clear that garden plants must not be allowed to spread into the wild. Mint runners travel into neighbouring ground, and material tipped with garden waste establishes readily where it was not wanted.
source
Legal or label requirementmoderate confidence
- GOV.UK guidance — UK Government: Prevent the spread of harmful invasive and non-native plants
Checked 2026-08-13
Do not tip mint runners onto open ground or into hedgerows; compost them in a closed heap or dispose of them with garden waste collection.
Sources for this page
Agriculture and Horticulture Development Board · GOV.UK guidance · Plant Finder · Purdue Extension · Royal Horticultural Society
Each figure on this page carries its own citation, under the “where these figures come from” note in its section. Record last reviewed 2026-08-13.
If something is wrong with it
- Dark or black spots on leaves — 2 causes GrowingHQ holds for mint
- Lower leaves turning yellow — 2 causes GrowingHQ holds for mint
Something else? Work through it with the diagnostic tool.