UK temperature
Keeping hoya polyneura (fishtail hoya) warm in a UK home
Hoya polyneura
More about hoya polyneura (fishtail hoya) in the UK
The UK home, in plant terms
A typical UK home creates two opposite micro-problems at the same time. Radiator-driven heating spikes the air temperature and crashes humidity in the rooms where people actually sit; the older the housing stock the more likely a single-glazed window pane is sitting at near-freezing in January with a houseplant against it. Cold unheated bedrooms, north-facing rooms and conservatories without heating run far cooler than the thermostat suggests, and the British winter gives the lowest indoor daylight in any of Growli's markets. Hoya polyneura (Fishtail Hoya) is frost-tender, so the radiator-warmed side of the house is right for it in winter — just not pressed against a cold pane or directly in the radiator updraft.
The actual numbers
Ideally hoya polyneura (fishtail hoya) sits between 10-25C. (That is 50-77F in Fahrenheit.) Comes from monsoon-misted Himalayan forests and prefers steady moderate-to-high humidity, around 50% or more. It copes with average household air better than many thin-leaved hoyas, but a pebble tray, nearby plants or a humidifier helps in dry, heated rooms. Avoid prolonged spells below ~40% humidity. Watch for the room dropping below about 10°C overnight — common in UK unheated bedrooms in January, and the point where growth stalls and leaves chill-mark.
For the RHS hardiness side of this, see is hoya polyneura (fishtail hoya) hardy in the UK? (rating RHS , sourced from the RHS rating system). For the US/USDA framing of the same numbers, see the hoya polyneura (fishtail hoya) temperature guide.
Winter placement in a UK home
For hoya polyneura (fishtail hoya) through a UK winter, three placement rules clear up most problems: 1) keep it at least a hand's width back from the window pane on single-glazed or very cold double-glazed glass, especially overnight when curtains close behind the plant; 2) keep it out of the direct vertical updraft above a radiator — that column of hot dry air browns leaf tips even on tolerant species; 3) judge by the room you can actually feel, not the central thermostat — many UK rooms run several degrees below the hall reading in winter. Humidity drops to roughly 25–35% in a heated UK living room; a pebble tray, grouping with other plants, or a small humidifier puts that back to a level houseplants actually like.
Hoya polyneura (Fishtail Hoya) temperature in the UK — frequently asked questions
What temperature does hoya polyneura (fishtail hoya) need in the UK?
Hoya polyneura (Fishtail Hoya) prefers 10-25C (50-77F). The British issue is rarely the average — it is the extremes: a cold single-glazed window in January, the hot dry air directly above a radiator, or a north-facing unheated room that runs far cooler than the hall thermostat.
Will hoya polyneura (fishtail hoya) survive a cold UK winter room?
Hoya polyneura (Fishtail Hoya) is frost-tender (RHS undefined). Keep it well above freezing, ideally above 10°C overnight, which means the radiator-warmed side of the house rather than an unheated bedroom or conservatory.
Can hoya polyneura (fishtail hoya) go on a UK windowsill in winter?
On a single-glazed or very cold pane, no — overnight the leaves pressed against the glass can drop below the plant's comfort band, especially behind drawn curtains. A small gap (a hand's width back) or thicker thermal curtains in front of the plant fixes it, and modern double-glazing usually solves it outright.
Does UK radiator-driven heating dry hoya polyneura (fishtail hoya) out?
Yes — UK living rooms typically run at around 25–35% relative humidity in winter. That is well below what most houseplants prefer. Hoya polyneura (Fishtail Hoya) tolerates this better than the calathea-and-fern family, but a pebble tray or grouping plants still helps.
What temperature range does hoya polyneura (fishtail hoya) actually like?
10-25C is the comfortable band (50-77F in Fahrenheit for reference). That covers normal UK living-room temperatures all year; the work is making sure cold pockets (windowsills, unheated rooms) and hot pockets (radiator updrafts) do not push it outside that band.
More hoya polyneura (fishtail hoya) care
See the full hoya polyneura (fishtail hoya) care guide, its UK watering (hard vs soft tap water), and UK hardiness.