For some reasons, radiators and windows always seem to go together… and that is most inconvenient for your houseplants. Winter is when most plants need the brightest light possible and that is usually right in front of a windowl And when the heat is on, the hot, dry air from the radiator parches the poor plants sitting on the narrow window ledge just above.
Fortunately, there’s a simple solution: install a wider shelf at the base of the window. Not only does it give you more surface space on which to grow plants, but it also directs heat toward the center of the room, which is where you want it anyway.
There are dozens of ways of installing a plant shelf, but the easiest is probably just to fix brackets to the wall and install a plank over top as in the illustration to the right.
Because warm air rising in front of the shelf can still dry out your plants, you can go one step further and equip the shelf with a humidity tray. That way your plants will have bright light, great humidity, and still get a bit of warmth from the radiator.