Hibiscus is the houseplant that looks like a vacation. The big, bright flowers are the reason people buy it, and they are also the reason people struggle with it. A hibiscus wants strong light, steady warmth, regular water, and regular feeding. Provide those and it flowers freely; fall short on one and it drops buds as a warning.
This guide covers the needs of tropical hibiscus (Hibiscus rosa-sinensis) in the order that affects results most. If the buds are the issue, why hibiscus buds drop goes deeper.
Light
Hibiscus needs as much light as it can get. A south- or west-facing window with several hours of direct sun is ideal, and in warm weather the plant does well outdoors in full sun. In low light it grows slowly and flowers poorly. When moving it from indoors to full sun, introduce it gradually over a week or two so the leaves do not scorch. If the room is dark, see grow lights for houseplants.
Watering
Hibiscus drinks heavily during active growth, especially in heat, and wilts fast when the soil dries out. Water thoroughly when the top of the soil begins to dry, let the excess drain, and empty the saucer. Do not leave the roots in standing water. In winter, when growth slows, water less often. The guide to overwatering and underwatering helps when the signs are confusing.
Soil and potting
Use a loose, well-draining potting mix with some organic matter, in a pot with drainage holes. Hibiscus does best slightly root-bound, so repot only when roots fill the container, moving up one pot size at a time. A pot that is much too large holds extra water and raises the risk of root rot; see root rot in houseplants.
Humidity and temperature
Hibiscus is tropical and likes warmth. Keep it away from cold drafts and chilly windows, and avoid leaving it outdoors on cold nights. Average household humidity is usually acceptable, but very dry air from heating can encourage spider mites. A humidifier nearby helps; see the best humidifiers for houseplants.
Fertilizing
Hibiscus is a hungry plant. During the growing season, feed regularly with a fertilizer made for hibiscus or flowering plants, following the label directions. Ease off in winter when growth slows. Do not fertilize a plant that is dry or wilted.
Pruning and propagation
Pruning keeps the plant compact and encourages branching. Trim back leggy stems in spring, cutting just above a leaf node. Hibiscus can also be propagated from softwood stem cuttings, rooted in a moist, warm, bright spot, ideally with rooting hormone. Success is lower than with easy plants such as pothos, so take several cuttings.
The flowers: what makes this plant different
What sets hibiscus apart from most houseplants is that each flower lasts only a short time, often a single day, so a healthy plant is always producing new buds rather than holding a long display. That means steady conditions matter more than usual: a plant that cannot support its buds will drop them, and the plant then looks as though it has stopped flowering. Consistent light, warmth, water, and feeding keep the supply going.
It also changes how much to read into a single bud falling. A few spent flowers are normal for this plant, while losing most of the buds before they open signals a problem with conditions.
Common problems
Bud drop, yellow leaves, and sticky or webbed foliage are the usual complaints. The page on why hibiscus buds drop sorts out the causes. For a wider look at what a struggling plant might be showing, see houseplant problems by symptom.
A few things people ask
Why is a hibiscus not flowering?
Most often the plant is not getting enough light, or it is short on feeding or water. Sudden changes in temperature or location can also cause it to hold back or drop buds.
Can a hibiscus live indoors all year?
Yes, if it gets very bright light and warmth. Many growers move it outdoors in warm weather and bring it back in before cold nights.
How long does a hibiscus flower last?
Individual flowers are short-lived, often lasting about a day, but a healthy plant keeps producing new ones.
Is hibiscus safe around pets?
The ASPCA lists hibiscus as non-toxic to dogs, cats, and horses. See the ASPCA hibiscus page for details, though chewing on any plant can still upset a pet’s stomach.