Plant care
Gryphon Begoniatemperature & humidity
Begonia 'Gryphon' (Begonia x hybrida)
More about gryphon begonia
Ideal temperature for gryphon begonia
Aim for 16–29°C (60–85°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 16°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Gryphon Begonia is comparatively hardy (USDA 8–10 (grown outdoors as a perennial/annual; treated as a houseplant or container plant in cooler zones), RHS undefined). 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 gryphon begonia
Gryphon Begonia sits happiest at around Moderate, around 50–60% relative humidity. Appreciates moderate humidity but is more forgiving of average indoor air than rex or rhizomatous begonias. Avoid combining high humidity with stagnant air, as that invites powdery mildew and botrytis — prioritize good air circulation over misting (wet leaves can spot). 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.
Gryphon Begonia temperature & humidity — frequently asked questions
What temperature is best for gryphon begonia?
Gryphon Begonia grows best between 16–29°C (60–85°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 gryphon begonia tolerate?
Gryphon Begonia starts to suffer below roughly 16°C. It tolerates a cold dormant period within USDA 8–10 (grown outdoors as a perennial/annual; treated as a houseplant or container plant in cooler zones), but a wet cold root zone is more dangerous than cold air.
What humidity does gryphon begonia need?
Gryphon Begonia prefers about Moderate, around 50–60% relative humidity. Appreciates moderate humidity but is more forgiving of average indoor air than rex or rhizomatous begonias. Avoid combining high humidity with stagnant air, as that invites powdery mildew and botrytis — prioritize good air circulation over misting (wet leaves can spot).
How do I raise humidity for gryphon begonia?
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 gryphon begonia live outside?
Gryphon Begonia is rated for USDA zone 8–10 (grown outdoors as a perennial/annual; treated as a houseplant or container plant in cooler zones). 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 gryphon begonia care
In the UK? Keeping gryphon begonia warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full gryphon begonia care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.