Tropical Hibiscus / Chinese Hibiscus
Hibiscus rosa-sinensis
description
Tropical Hibiscus is a sun-loving shrub producing large dramatic flowers through warm weather.
benefits
- Pet-friendly, non-toxic to animals
- Flowering
- Suitable for containers
How to care for Tropical Hibiscus
sunlight
In tropical gardens, hibiscus grows in open, sunny spots. Give it the brightest window you have to support dense growth and regular flowering.
Full sun
A south or west-facing window is ideal indoors. Aim for about 6 hours of direct sun daily. Bright indirect light is tolerated, but expect fewer flowers and leggier growth.
watering
Keep Tropical Hibiscus evenly moist but never waterlogged. Water thoroughly when the top 1 inch of soil feels dry, then let excess drain away.
Warm, bright growing season
In strong light and warm weather, this may be about every 2-4 days, especially for plants outdoors or in small pots. Check the soil first: it should be moist below the surface, not saturated.
Cooler or lower-light months
Growth slows indoors in winter, so watering is often needed roughly every 7-14 days. Wait until the top 1-2 inches are dry and the pot feels lighter before watering.
Frequency changes with light, temperature, humidity, pot size and material, soil mix, and how actively the roots are growing. Water slowly until it runs from the drainage holes, then empty the saucer.
humidity
Preferred humidity
As a tropical shrub, hibiscus flowers best in moderately humid air. Most homes are suitable at 40% or higher, but dry air can make buds drop before opening and leave leaf edges brown or crisp.
Acceptable minimum
Humidity often falls near heating or air conditioning. Keep the plant away from direct blasts, especially while it is budding or flowering.
- Group plants together or run a humidifier during dry spells.
- Use a pebble tray only if the pot sits above, not in, the water.
temperature
Preferred range
Winter minimum
Tropical hibiscus grows best in steady warmth. Keep it indoors before nights fall below 13°C (55°F); cool conditions slow growth and can trigger leaf drop. It tolerates warmer weather if watered well, but prolonged heat above 32°C (90°F) can cause buds to drop.
nutrition
March - October
Feed every 2 weeks with a liquid fertilizer for flowering plants, diluted to about half the label strength. Tropical hibiscus grows and blooms heavily in warm, bright conditions, but use less or pause feeding when growth slows in winter or low light.
Nitrogen
Nitrogen supports the leafy growth that fuels flowering. A regular, balanced flowering fertilizer provides enough without encouraging lots of soft leaves at the expense of blooms.
Potassium
Potassium supports sturdy growth and flower production. Choose a fertilizer intended for flowering plants rather than one made mainly for foliage.
soil
Rich, airy, moisture-retentive soil
Tropical hibiscus flowers best in soil that holds some moisture and nutrients without staying soggy around the roots. Use a quality potting mix amended with compost and perlite or fine bark for a loose, well-draining texture.
pH 6,0 - 6,5
This is slightly acidic, which helps hibiscus take up nutrients well. Most mixes labeled for flowering plants are suitable; avoid strongly alkaline garden soil or mixes with lots of lime.