Plant care
Globe Artichoketemperature & humidity
Cynara cardunculus var. scolymus 'Green Globe'
More about globe artichoke
Ideal temperature for globe artichoke
Temperature kills fewer globe artichoke 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 13-24°C (55-75°F) is fine; the spot you put the plant in matters more. Below roughly 13°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Globe Artichoke is comparatively hardy (USDA 7-11 (overwinters outdoors in mild zones; mulch or lift the crown in zone 7), 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 globe artichoke
Globe Artichoke sits happiest at around 40-70% relative humidity. Tolerant of ambient outdoor humidity; no special requirement. Good airflow between large plants helps prevent fungal leaf problems in damp, mild conditions. 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.
Globe Artichoke temperature & humidity — frequently asked questions
What temperature is best for globe artichoke?
Globe Artichoke grows best between 13-24°C (55-75°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 globe artichoke tolerate?
Globe Artichoke starts to suffer below roughly 13°C. It tolerates a cold dormant period within USDA 7-11 (overwinters outdoors in mild zones; mulch or lift the crown in zone 7), but a wet cold root zone is more dangerous than cold air.
What humidity does globe artichoke need?
Globe Artichoke prefers about 40-70% relative humidity. Tolerant of ambient outdoor humidity; no special requirement. Good airflow between large plants helps prevent fungal leaf problems in damp, mild conditions.
How do I raise humidity for globe artichoke?
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 globe artichoke live outside?
Globe Artichoke is rated for USDA zone 7-11 (overwinters outdoors in mild zones; mulch or lift the crown in zone 7) 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 globe artichoke care
In the UK? Keeping globe artichoke warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full globe artichoke care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.