Plant care
Mortgage Lifter Beantemperature & humidity
Phaseolus vulgaris 'Dragon Tongue'
More about mortgage lifter bean
Ideal temperature for mortgage lifter bean
Temperature kills fewer mortgage lifter bean 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 18-27°C (65-80°F) is fine; the spot you put the plant in matters more. Below roughly 18°C the damage starts — soft blackened patches, translucent leaves, sometimes overnight.
Cold tolerance & winter care
Mortgage Lifter Bean is frost-tender (USDA Grown as a warm-season annual in all zones; frost-tender, 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 mortgage lifter bean
Mortgage Lifter Bean sits happiest at around 40-70% relative humidity. Ambient humidity is fine. High humidity with poor airflow encourages rust and anthracnose, so space plants and keep foliage dry. 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.
Mortgage Lifter Bean temperature & humidity — frequently asked questions
What temperature is best for mortgage lifter bean?
Mortgage Lifter Bean grows best between 18-27°C (65-80°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 mortgage lifter bean tolerate?
Mortgage Lifter Bean starts to suffer below roughly 18°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 mortgage lifter bean need?
Mortgage Lifter Bean prefers about 40-70% relative humidity. Ambient humidity is fine. High humidity with poor airflow encourages rust and anthracnose, so space plants and keep foliage dry.
How do I raise humidity for mortgage lifter bean?
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 mortgage lifter bean live outside?
Mortgage Lifter Bean is rated for USDA zone Grown as a warm-season annual in all zones; frost-tender 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 mortgage lifter bean care
In the UK? Keeping mortgage lifter bean warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full mortgage lifter bean care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.