Peppermint: Sowing, planting and harvest calendar
How do you propagate peppermint?
To grow peppermint (Mentha × piperita), start with an identified plant, cutting or division rather than seeds. This hybrid does not come true from seed, so seeds sold simply as mint do not guarantee peppermint.
In spring, plant it out in mild conditions in moist, well-drained soil, in sun or partial shade. Prepare the site by removing weeds and add a little compost if needed. Keep the soil moist while the plant establishes, without waterlogging it.
Choose a pot with drainage holes if you want to control its spread. Watch for stems reaching the soil around the pot. Plant spacing is not an instruction for spacing individual seeds.
How to care for this plant
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Contain spreading rhizomes
Look for mint shoots spreading beyond their allotted space. If they crowd neighbouring crops, remove them with the accessible rhizomes rather than cutting them at ground level. In pots, also check for stems rooting outside the container.
How do you harvest peppermint?