Plant care
Blood Orange Morotemperature & humidity
Citrus sinensis 'Moro'
More about blood orange moro
Ideal temperature for blood orange moro
Temperature kills fewer blood orange moro 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 13-30°C (55-86°F) is fine; the spot you put the plant in matters more. Below roughly 13°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Blood Orange Moro is frost-tender (USDA 9-11 (overwinter under glass in cooler zones), RHS H2). It cannot survive a frost, so in most of the US and UK it lives indoors year-round or summers outside and comes back in well before the first autumn frost — once nights drop toward 10-12°C is the cue, not the first frost warning. Acclimate it over a week when moving between indoors and out so the leaves do not shock.
Humidity for blood orange moro
Blood Orange Moro sits happiest at around 40-60% relative humidity. Comfortable across normal outdoor and greenhouse humidity. Very dry indoor winter air promotes leaf drop and scale; improve airflow and avoid placing plants beside radiators. 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.
Blood Orange Moro temperature & humidity — frequently asked questions
What temperature is best for blood orange moro?
Blood Orange Moro grows best between 13-30°C (55-86°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 blood orange moro tolerate?
Blood Orange Moro starts to suffer below roughly 13°C. It is frost-tender and will be damaged or killed by a frost, so bring it indoors once nights fall toward 10-12°C.
What humidity does blood orange moro need?
Blood Orange Moro prefers about 40-60% relative humidity. Comfortable across normal outdoor and greenhouse humidity. Very dry indoor winter air promotes leaf drop and scale; improve airflow and avoid placing plants beside radiators.
How do I raise humidity for blood orange moro?
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 blood orange moro live outside?
Blood Orange Moro is rated for USDA zone 9-11 (overwinter under glass in cooler zones) and RHS hardiness H2. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More blood orange moro care
In the UK? Keeping blood orange moro warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full blood orange moro care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.