Plant care
Passiflora edulistemperature & humidity
Passiflora edulis
More about passiflora edulis
Ideal temperature for passiflora edulis
Aim for 13 to 30°C (55 to 86°F) on the thermostat and you've handled the easy part. The hard part is the half-metre around the plant: window glass that drops to near-freezing on a January night, a radiator pumping out hot dry air, a draught from an opened front door. Move the plant 30 cm and you've usually fixed the problem. Below roughly 13°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Passiflora edulis is frost-tender (USDA 9-11 (frost-tender; grow under glass in cooler zones), RHS H1c). 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 passiflora edulis
Passiflora edulis sits happiest at around 50-70% relative humidity. Enjoys moderate to high humidity reflecting its subtropical origin. Under glass, ventilate to prevent excessive dampness and fungal disease while keeping the air from becoming arid. 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.
Passiflora edulis temperature & humidity — frequently asked questions
What temperature is best for passiflora edulis?
Passiflora edulis grows best between 13 to 30°C (55 to 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 passiflora edulis tolerate?
Passiflora edulis 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 passiflora edulis need?
Passiflora edulis prefers about 50-70% relative humidity. Enjoys moderate to high humidity reflecting its subtropical origin. Under glass, ventilate to prevent excessive dampness and fungal disease while keeping the air from becoming arid.
How do I raise humidity for passiflora edulis?
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 passiflora edulis live outside?
Passiflora edulis is rated for USDA zone 9-11 (frost-tender; grow under glass in cooler zones) and RHS hardiness H1c. Outside that range it must come indoors before the first frost — treat any outdoor stint as a summer holiday, not a permanent home.
More passiflora edulis care
In the UK? Keeping passiflora edulis warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full passiflora edulis care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.