Plant care
Mizuna 'Early Mizuna'temperature & humidity
Brassica rapa var. nipposinica 'Early Mizuna'
More about mizuna 'early mizuna'
Ideal temperature for mizuna 'early mizuna'
Mizuna 'Early Mizuna' is comfortable in any room a person is comfortable in, roughly 10-24°C (50-75°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly 10°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Mizuna 'Early Mizuna' is comparatively hardy (USDA Grown as a cool-season annual in zones 2-11, RHS H4). Within that range it tolerates a cold dormant spell outdoors; outside it, grow it in a container you can move under cover or overwinter in a cool but frost-free spot. Hardiness assumes an established plant in well-drained soil — a wet, cold root zone kills far more plants than cold air alone.
Humidity for mizuna 'early mizuna'
Mizuna 'Early Mizuna' sits happiest at around Ambient outdoor relative humidity. No special humidity needs as a salad and stir-fry crop; open spacing limits downy mildew and rot on the dense rosettes in wet spells. The usual low-humidity tell is crisp brown leaf tips and edges while the soil moisture is fine — a sign the air, not the watering, is the problem. If you need to raise it, the reliable methods are grouping plants together, standing the pot on a tray of damp pebbles (the pot above the waterline, never in it), or running a small humidifier in winter when indoor heating dries the air most. Misting is the least effective — it raises humidity for minutes, not hours.
Mizuna 'Early Mizuna' temperature & humidity — frequently asked questions
What temperature is best for mizuna 'early mizuna'?
Mizuna 'Early Mizuna' grows best between 10-24°C (50-75°F). Keep it out of cold draughts, off freezing windowsills in winter, and away from the hot dry air directly above radiators — the extremes matter far more than the average room temperature.
How cold can mizuna 'early mizuna' tolerate?
Mizuna 'Early Mizuna' starts to suffer below roughly 10°C. It tolerates a cold dormant period within USDA Grown as a cool-season annual in zones 2-11, but a wet cold root zone is more dangerous than cold air.
What humidity does mizuna 'early mizuna' need?
Mizuna 'Early Mizuna' prefers about Ambient outdoor relative humidity. No special humidity needs as a salad and stir-fry crop; open spacing limits downy mildew and rot on the dense rosettes in wet spells.
How do I raise humidity for mizuna 'early mizuna'?
Group it with other plants, stand the pot on a tray of damp pebbles (kept above the waterline), or run a small humidifier in winter. Misting only helps for a few minutes, so it is the weakest option for a plant that genuinely needs more humidity.
Can mizuna 'early mizuna' live outside?
Mizuna 'Early Mizuna' is rated for USDA zone Grown as a cool-season annual in zones 2-11 and RHS hardiness H4. Within that range it can stay outdoors; outside it, grow it in a moveable container and protect the roots from a wet, cold winter.
More mizuna 'early mizuna' care
In the UK? Keeping mizuna 'early mizuna' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full mizuna 'early mizuna' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.