Plant care
Miniature Creeping Jennytemperature & humidity
Lysimachia japonica 'Minutissima'
More about miniature creeping jenny
Ideal temperature for miniature creeping jenny
Temperature kills fewer miniature creeping jenny 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°C to 25°C (14°F to 77°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
Miniature Creeping Jenny is comparatively hardy (USDA 6-9, RHS H5). 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 miniature creeping jenny
Miniature Creeping Jenny sits happiest at around Moderate to high (50–80%) relative humidity. Thrives in humid conditions; ideal for terrariums and enclosed planters where humidity stays high. Outdoors, moist, sheltered positions suit it well. Low humidity combined with heat causes leaf edge browning and wilting. 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.
Miniature Creeping Jenny temperature & humidity — frequently asked questions
What temperature is best for miniature creeping jenny?
Miniature Creeping Jenny grows best between −10°C to 25°C (14°F to 77°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 miniature creeping jenny tolerate?
Miniature Creeping Jenny starts to suffer below roughly 10°C. It tolerates a cold dormant period within USDA 6-9, but a wet cold root zone is more dangerous than cold air.
What humidity does miniature creeping jenny need?
Miniature Creeping Jenny prefers about Moderate to high (50–80%) relative humidity. Thrives in humid conditions; ideal for terrariums and enclosed planters where humidity stays high. Outdoors, moist, sheltered positions suit it well. Low humidity combined with heat causes leaf edge browning and wilting.
How do I raise humidity for miniature creeping jenny?
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 miniature creeping jenny live outside?
Miniature Creeping Jenny is rated for USDA zone 6-9 and RHS hardiness H5. 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 miniature creeping jenny care
In the UK? Keeping miniature creeping jenny warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full miniature creeping jenny care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.