Plant Care Hibiscus Trionum

Hibiscus Trionum

Also known as

Flower of an Hour, Flower of an Hour, Flower-of-an-hour, Bladder hibiscus, Bladder ketmia, Bladder weed, Flower-of-the-hour, Modesty, Puarangi, Shoofly and Venice mallow


Hibiscus trionum

How to care for Hibiscus Trionum


How often to water your Hibiscus Trionum

Water needs for Hibiscus Trionum
0.5 cups
every 9

Hibiscus Trionum needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot.

Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

Calculate water needs of Hibiscus Trionum

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size


Check the growing potential in your area

A plant's growing potential is determined from its location, the time of year, and current local weather.

Select a city to check sunlight intensity

Finding light for Flower of an Hour in your home

Light needs and placement for plant Hibiscus Trionum: 1ft from a window
1ft or less from
a window

Hibiscus Trionum love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Hibiscus Trionum does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Hibiscus Trionum in your home 🏡.


How to fertilize Hibiscus Trionum

Nutrient, fertilizer, and repotting needs for Hibiscus Trionum: repot after 2X growth

Most potting soils come with ample nutrients which plants use to produce new growth.

By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.

To replenish this plant's nutrients, repot your Hibiscus Trionum after it doubles in size or once a year—whichever comes first.

Difficulty Level

Hibiscus Trionum is generally considered an easy-to-care-for plant and makes a great choice for beginners!

Water Needs
Sunlight Needs
Native Region
Growing Outdoors

Care Summary for Hibiscus Trionum

Hibiscus Trionum

Hibiscus Trionum

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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