Plant Care Water Caltrop

Water Caltrop

Also known as

Water Chestnut


Trapa natans

How to care for Water Caltrop


How often to water your Water Caltrop

Water needs for Water Caltrop
0.5 cups
every 9

Water Caltrop 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 Water Caltrop

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 Water Chestnut in your home

Light needs and placement for plant Water Caltrop: 3ft from a window
3ft or less from
a window

Water Caltrop may have difficulty thriving, and will drop leaves 🍃, without ample sunlight.

Place it less than 3 feet from a south-facing window to maximize the potential for growth.

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


How to fertilize Water Caltrop

Nutrient, fertilizer, and repotting needs for Water Caltrop: 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 Water Caltrop after it doubles in size or once a year—whichever comes first.

Water Needs
Sunlight Needs
Growing Outdoors

Care Summary for Water Caltrop

Water Caltrop

Water Caltrop

Greg recommends:


0.5 cups every 9 days


< 3ft 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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