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Outdoor · Herb Last verified Aug 10, 2026

Mint

Container growers Beginner-friendly Open garden beds

Mentha spicata (spearmint) is a vigorous perennial herb in the mint family (Lamiaceae), prized for fresh-cut leaves in drinks and cooking — and infamous for underground runners that will take over any open bed. The single most important mint rule: always grow it in a container, never in open ground.

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    TL;DR

    Mint is one of the easiest herbs to grow — and the most invasive. Its underground runners (rhizomes) spread aggressively, so ALWAYS grow it in a container, never in open ground; even a sunken pot can escape through the drainage hole. Give it part sun to full sun, consistently moist soil, and harvest cut-and-come-again by snipping stems above a leaf pair. Ready to pick 60-90 days from seed, or within weeks from a nursery plant.

    Key facts

    • Invasive spreader: mint's rhizomes colonise open beds within a season or two and are extremely hard to eradicate — container growing is non-negotiable, not a style preference.
    • Perennial in USDA zones 3-9; it dies back in winter and regrows from the roots each spring.
    • Cut-and-come-again: regular harvesting makes the plant bushier and more productive, not weaker.
    • Mint cross-pollinates and hybridises freely, so seed-grown plants are variable — buy a named plant or take a cutting for true-to-type flavour.
    60-90 days
    seed to first harvest
    Container only
    never open ground
    Part-full sun
    4-6+ hrs/day
    $3-6
    per potted plant, US

    Growing requirements#

    Plant typeHardy herbaceous perennial herb (dies back in winter, regrows in spring)
    Growing mediumContainer ONLY — 25-30cm+ pot with general-purpose potting mix; never open ground (rhizomes invade beds and are nearly impossible to remove)
    Light needsPart sun to full sun (4-6+ hours); tolerates more shade than most herbs
    Water frequencyKeep consistently moist — mint is one of the few herbs that dislikes drying out
    Days to harvest60-90 days from seed; a few weeks from a nursery plant or rooted cutting
    Sowing seasonNorthern hemisphere: spring (Mar-May). Southern hemisphere: Sep-Nov. Tropics/India: post-monsoon through winter; nursery plants year-round
    Container suitabilityExcellent — in fact mandatory; thrives in pots, window boxes, and balcony troughs
    Temperature rangeGrows best 13-27°C (55-80°F); roots hardy through hard frost dormant (USDA zones 3-9)
    FertilizerLight monthly liquid feed in the growing season; over-feeding dulls flavour
    Harvest techniqueCut-and-come-again: snip stems just above a leaf pair; regular cutting keeps it bushy and productive
    Pet safetyMild GI upset possible in cats/dogs if eaten in quantity; pennyroyal (a different Mentha) is genuinely toxic to pets
    Culinary storageStems in a glass of water in the fridge keep 1+ week; freeze chopped leaves in ice cubes for months

    Growth, harvest & propagation#

    Growth habitSpreading perennial, 30-60cm tall, expanding sideways by rhizomes indefinitely
    YieldContinuous handfuls from spring to autumn from a single 30cm pot
    Edible partsLeaves and tender stem tips; flowers are edible too
    Propagation methodsStem cuttings root in a glass of water in about a week; division of the rootball; seed (variable flavour)
    Pruning needsCut back hard mid-season if it gets leggy; shear to 5cm in late autumn
    RepottingDivide and repot every 1-2 years — pot-bound mint loses vigour in the centre

    Common problems & troubleshooting#

    SymptomLikely causeFix
    Orange pustules on leaf undersidesMint rust (Puccinia menthae), a fungal disease specific to mintsRemove and bin (don't compost) affected stems; badly infected plants should be cut to soil level or replaced from a clean cutting
    Mint appearing all over the garden bedRunners escaped a sunken or cracked potDig out every rhizome fragment (each piece regrows); move the pot onto a hard surface like a patio
    Leggy stems with sparse, small leavesToo much shade or the plant isn't being harvestedMove to a brighter spot and cut back by half — mint regrows bushier after hard cutting
    Bare, woody centre with growth only at the edgesPot-bound rootball exhausted in the middleTip out, split the rootball, and replant a vigorous outer section in fresh mix
    Wilting despite moist soil, stippled leavesSpider mites in hot dry spellsHose foliage down, raise humidity around the pot, treat with insecticidal soap if severe
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    Seasonal care#

    Spring
    New shoots emerge from the roots; divide and repot now, start harvesting once stems hit 15cm.
    Summer
    Peak production — harvest constantly, keep soil moist, cut back hard if flowering starts (flavour dulls after bloom).
    Autumn
    Growth slows; take a final big harvest to freeze or dry, then shear plants to 5cm.
    Winter
    Dormant — top growth dies back but roots survive hard frost; keep the pot barely moist. A pot on a bright windowsill keeps producing indoors.

    Varieties & cultivars#

    VarietyDistinguishing traitNote
    Spearmint (M. spicata)The classic sweet 'garden mint' — pointed leaves, mild mentholMojitos, mint sauce, chutneys, teas
    Peppermint (M. × piperita)Spearmint × watermint hybrid with a much higher menthol punchTeas, desserts, extracts
    'Moroccan' mintCompact spearmint selection with a clean, strong flavourTraditional Moroccan mint tea
    Apple mint (M. suaveolens)Fuzzy round leaves, fruity aroma, especially vigorous spreaderFruit salads, infused water

    Buying checklist#

    • Buy a named plant (or take a cutting) rather than seed — seed-grown mint has unpredictable flavour
    • Crush a leaf and smell it: it should be strongly aromatic, not musty
    • Check leaf undersides for orange rust pustules — walk away if present
    • Stems firm and green, not blackened at the base
    • Buy a container at the same time if you don't have one — you'll need it on day one

    Pricing by region#

    RegionPrice rangeTypical unitBasis
    US$3 – $64in potted plantGarden centre + grocery herb section
    UK$2.50 – $69cm potted plantGarden centre + supermarket
    India$0.25 – $1Potted pudina plantLocal nursery; fresh bunches far cheaper at market
    Australia$3 – $6Potted herbNursery + hardware garden retail
    Canada$3 – $5Potted herbGarden centre + grocery retail
    What drives the price: Named variety vs genericPot sizeOrganic certificationGrocery vs specialist nursery

    USD figures are approximate conversions for comparison; switch the dropdown to see each region's actual local-currency listing price.

    Often confused with#

    Lemon balm (Melissa officinalis) — same square stems and crinkled leaves, but crush a leaf: lemon balm smells of citrus, mint of menthol. Lemon balm is an aggressive self-seeder rather than a runner-spreader.
    Catnip (Nepeta cataria) — greyer, downy foliage and a musky rather than sweet-menthol scent; famously attractive to cats where mint is not.

    Name confusion warning#

    !

    "Mint" covers many species. In the UK, "garden mint" almost always means spearmint; in India, "pudina" usually refers to spearmint too, while US grocery "mint" may be spearmint or peppermint. Check the botanical name — flavours differ substantially between species.

    Where it's actually grown#

    Retail mint plants are propagated locally from cuttings in regional greenhouse nurseries — mint roots so easily that international shipping of live plants makes no commercial sense. Supermarket "living herb" pots are grown in dense hydroponic trays intended for one or two harvests, though they can be split and potted on for the garden.

    Import & biosecurity restrictions#

    RegionNote
    AustraliaLive plant imports are effectively prohibited for individuals under biosecurity law; seed requires an import permit. Buy domestically — mint is widely sold.
    USNo domestic restriction on sale, but its invasive spread makes in-ground planting inadvisable everywhere.
    UKFreely sold; post-Brexit plant imports from the EU need phytosanitary certificates for commercial quantities.
    IndiaNo restriction; pudina is a staple nursery and market herb nationwide.
    CanadaFreely sold domestically; CFIA rules apply to commercial live-plant imports.

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    Did you know?

    Most commercial peppermint plants aren't grown from seed at all — peppermint is a sterile hybrid (spearmint × watermint) that produces no viable seed, so every peppermint plant on Earth is a clone propagated by cuttings, essentially the same plant copied for centuries.

    Frequently asked questions

    Why should mint never be planted in the ground?

    Mint spreads by underground rhizomes that can colonise an entire bed within a season or two and are extremely difficult to remove — every rhizome fragment regrows. Always grow it in a container placed on a hard surface.

    How do I harvest mint so it keeps producing?

    Use the cut-and-come-again method: snip stems just above a pair of leaves. The plant branches from that point and regrows bushier; regular harvesting increases yield.

    Is mint safe for cats and dogs?

    Garden mint (Mentha species) can cause mild stomach upset in cats and dogs if eaten in quantity, though small nibbles are rarely serious. Pennyroyal, a different Mentha, is genuinely toxic and should be kept away from pets.

    How long does mint take from seed to harvest?

    About 60-90 days from seed, but seed-grown mint is variable in flavour. A nursery plant or rooted cutting is harvestable within a few weeks and true to type.

    What is the best way to store fresh mint?

    Stand cut stems in a glass of water, loosely bagged, in the fridge — they keep a week or more. For longer storage, freeze chopped leaves in ice-cube trays topped up with water.

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