Hibiscus care: watering, light and repotting
Also called chinese hibiscus, tropical hibiscus · Hibiscus rosa-sinensis · Malvaceae family
7 d in winter
How often to water the hibiscus?
Allow about 3 days between waterings in spring and summer, and 7 days in autumn and winter, when growth slows down. These rhythms apply to a room with its favourite light: in a darker room the plant drinks less; in a brighter one, it drinks more.
Each flower lasts only a day, but it keeps making them with sun, water and fertiliser. Cut it back hard at the end of winter.
What light does it need?
The hibiscus loves the sun: a south- or west-facing window suits it, ideally less than 3 ft (1 m) from the glass. Without enough light, the stems stretch and growth slows down.
Repotting and fertiliser
Repot every 2 years, ideally in March, into a pot only slightly bigger than the last one. As for fertiliser, from March to September, feeding every 2 weeks is enough; the rest of the year, let it rest.
Adult size: 2–5 ft (60 cm–1.5 m).
Safe for cats and dogs, according to the ASPCA.
Common problems
Buds dropping
Cause: Thirst, being moved or not enough light. What to do: Water regularly and stop moving it.
Yellow leaves
Cause: Too much water or a cold snap. What to do: Let the surface dry out and keep it above 59 °F (15 °C).
Frequently asked questions
How often should you water the hibiscus?
About every 3 days in spring and summer, and every 7 days in autumn and winter, in a room with its favourite light. The darker the room, the longer you wait between waterings. Before watering, check that the top inch of soil has dried.
Where should you put the hibiscus?
The hibiscus loves the sun: a south- or west-facing window suits it, ideally less than 3 ft (1 m) from the glass. Without enough light, the stems stretch and growth slows down.
Should you mist the hibiscus?
There's no need: indoor air suits it. Wetting its leaves for no reason can even encourage disease.
When should you repot the hibiscus?
Every 2 years, ideally in March, or sooner if roots come out of the drainage hole. Choose a pot only slightly bigger, 1 to 1.5 in (2 to 4 cm) wider, always with a hole in the bottom.
Cats, dogs, children: is the hibiscus safe?
The hibiscus is listed as non-toxic to cats and dogs by the ASPCA. A pet that eats a lot of it may still vomit, so it's best not to let it nibble.
Is it an easy plant to care for?
Fairly: the hibiscus needs a little attention, mostly with watering and light. Nothing complicated with a reminder at the right time.
These are guidelines for an indoor plant in a temperate climate. Trust the soil too: a finger pushed an inch into it will tell you whether it's thirsty.