Plant care
Korean Radish 'Altari'temperature & humidity
Raphanus sativus var. caudatus 'Altari'
More about korean radish 'altari'
Ideal temperature for korean radish 'altari'
Temperature kills fewer korean radish 'altari' plants than you'd think. What kills them is the micro-climate within a normal-temperature room — a leaf pressed against single-glazed winter glass, the hot dry updraft directly above a radiator, the cold blast from an AC vent. The thermostat reading at 10-24°C (50-75°F) is fine; the spot you put the plant in matters more. Below roughly 10°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Korean Radish 'Altari' is comparatively hardy (USDA Annual; grown in zones 2-11 as a cool-season crop, RHS H4 (tolerates light frost; lift before hard freezes)). 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 korean radish 'altari'
Korean Radish 'Altari' sits happiest at around 40-70% relative humidity. Standard outdoor humidity is fine. Even soil moisture governs root and leaf quality far more than air humidity. 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.
Korean Radish 'Altari' temperature & humidity — frequently asked questions
What temperature is best for korean radish 'altari'?
Korean Radish 'Altari' 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 korean radish 'altari' tolerate?
Korean Radish 'Altari' starts to suffer below roughly 10°C. It tolerates a cold dormant period within USDA Annual; grown in zones 2-11 as a cool-season crop, but a wet cold root zone is more dangerous than cold air.
What humidity does korean radish 'altari' need?
Korean Radish 'Altari' prefers about 40-70% relative humidity. Standard outdoor humidity is fine. Even soil moisture governs root and leaf quality far more than air humidity.
How do I raise humidity for korean radish 'altari'?
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 korean radish 'altari' live outside?
Korean Radish 'Altari' is rated for USDA zone Annual; grown in zones 2-11 as a cool-season crop and RHS hardiness H4 (tolerates light frost; lift before hard freezes). 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 korean radish 'altari' care
In the UK? Keeping korean radish 'altari' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full korean radish 'altari' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.