Plant Care Flower of an Hour

Flower of an Hour

Also known as

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 Flower of an Hour


How often to water your Flower of an Hour

Water needs for Flower of an Hour
0.5 cups
every 9

Flower of an Hour 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 Flower of an Hour

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 Flower of an Hour: 1ft from a window
1ft or less from
a window

Flower of an Hour love being close to bright, sunny windows 😎.

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

Flower of an Hour does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Flower of an Hour in your home 🏡.


How to fertilize Flower of an Hour

Nutrient, fertilizer, and repotting needs for Flower of an Hour: 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 Flower of an Hour after it doubles in size or once a year—whichever comes first.

Difficulty Level

Flower of an Hour 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 Flower of an Hour

Flower of an Hour

Flower of an Hour

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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