Plant care
Aquilegia 'Black Barlow'temperature & humidity
Aquilegia vulgaris 'Black Barlow'
More about aquilegia 'black barlow'
Ideal temperature for aquilegia 'black barlow'
Temperature kills fewer aquilegia 'black barlow' 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 13-24°C (55-75°F) is fine; the spot you put the plant in matters more. Below roughly 13°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Aquilegia 'Black Barlow' is comparatively hardy (USDA 3-8, 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 aquilegia 'black barlow'
Aquilegia 'Black Barlow' sits happiest at around 40-60% relative humidity. A hardy outdoor border perennial needing no special humidity. It does best in temperate, moderately moist conditions; very hot, dry summers can scorch foliage and shorten the flowering display. 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.
Aquilegia 'Black Barlow' temperature & humidity — frequently asked questions
What temperature is best for aquilegia 'black barlow'?
Aquilegia 'Black Barlow' grows best between 13-24°C (55-75°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 aquilegia 'black barlow' tolerate?
Aquilegia 'Black Barlow' starts to suffer below roughly 13°C. It tolerates a cold dormant period within USDA 3-8, but a wet cold root zone is more dangerous than cold air.
What humidity does aquilegia 'black barlow' need?
Aquilegia 'Black Barlow' prefers about 40-60% relative humidity. A hardy outdoor border perennial needing no special humidity. It does best in temperate, moderately moist conditions; very hot, dry summers can scorch foliage and shorten the flowering display.
How do I raise humidity for aquilegia 'black barlow'?
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 aquilegia 'black barlow' live outside?
Aquilegia 'Black Barlow' is rated for USDA zone 3-8 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 aquilegia 'black barlow' care
In the UK? Keeping aquilegia 'black barlow' warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full aquilegia 'black barlow' care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.