How to Care for Hydrocotyle umbellata (Water Pennywort)

Korean name: 워터코인

Water pennywort is an aquatic plant with round, thin leaves that spread widely. It is well suited for indoor hydroponic cultivation and requires clean water and moderate light. Its leaves float gently on the water surface, offering a calming visual effect.

Key facts

• Category: Aquatic plant
• Difficulty: Easy
• Where to keep: indoors
• Native to: North America
• Growth rate: Fast
• Pets: Mildly toxic, so keep pets from chewing on it.
• Traits: beginner friendly, aquatic plant, indoor hydroponics, round leaves, fast growing
• Also known as: Water Pennywort, Dollarweed

Care Guide

• Light: Prefers bright, indirect light.
• Watering: Keep the water clean and provide enough so the roots are submerged.
• Soil: Hydroponic growing medium is ideal.
• Humidity: Maintaining high humidity is beneficial.
• Temperature: Suitable range is 18~27°C.
• Fertilizer: Apply diluted liquid fertilizer for aquatic plants every two weeks.

Common questions

How often should you water Hydrocotyle umbellata?

Keep the water clean and provide enough so the roots are submerged. Roughly every 7 days is the baseline; adjust for the season and the spot it sits in.

Where should you keep Hydrocotyle umbellata?

It likes Prefers bright, indirect light.. You can grow it indoors. Use Hydroponic growing medium is ideal..

Is Hydrocotyle umbellata safe around pets?

Mildly toxic, so keep pets from chewing on it.

Is Hydrocotyle umbellata good for beginners?

Difficulty: Easy. It is forgiving enough for a first plant. Keep it around Suitable range is 18~27°C.. Humidity: Maintaining high humidity is beneficial.. Fertilise Apply diluted liquid fertilizer for aquatic plants every two weeks..