Plant care
Black Scallop Bugletemperature & humidity
Ajuga reptans 'Black Scallop'
More about black scallop bugle
Ideal temperature for black scallop bugle
Black Scallop Bugle is comfortable in any room a person is comfortable in, roughly -20°C to 30°C (-4°F to 86°F). The mistakes are micro-climates: a north-facing window on a frosty night, a south-facing windowsill in a summer heatwave, the standing draught between an opened kitchen door and the radiator behind it. Read the room around the plant, not the thermostat. Below roughly -20°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Black Scallop Bugle is comparatively hardy (USDA 3–9, RHS H7). 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 black scallop bugle
Black Scallop Bugle sits happiest at around 40–70% relative humidity. Adapted to outdoor temperate humidity levels. Not sensitive to ambient humidity when planted in the ground. Mulching with bark or leaf mould helps maintain soil moisture during summer. In containers, monitor more closely in dry indoor 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.
Black Scallop Bugle temperature & humidity — frequently asked questions
What temperature is best for black scallop bugle?
Black Scallop Bugle grows best between -20°C to 30°C (-4°F 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 black scallop bugle tolerate?
Black Scallop Bugle starts to suffer below roughly -20°C. It tolerates a cold dormant period within USDA 3–9, but a wet cold root zone is more dangerous than cold air.
What humidity does black scallop bugle need?
Black Scallop Bugle prefers about 40–70% relative humidity. Adapted to outdoor temperate humidity levels. Not sensitive to ambient humidity when planted in the ground. Mulching with bark or leaf mould helps maintain soil moisture during summer. In containers, monitor more closely in dry indoor conditions.
How do I raise humidity for black scallop bugle?
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 black scallop bugle live outside?
Black Scallop Bugle is rated for USDA zone 3–9 and RHS hardiness H7. 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 black scallop bugle care
In the UK? Keeping black scallop bugle warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full black scallop bugle care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.