How to Care for Trapa japonica (Water Chestnut)

Korean name: 마름

Water chestnut is an aquatic plant characterized by its small floating leaves and uniquely shaped fruit. The leaves are fan-shaped, and small white flowers bloom in summer. It thrives in clear water with adequate sunlight.

Key facts

• Category: Aquatic plant
• Difficulty: Moderate
• Where to keep: outdoors
• Native to: Korea, Japan, China
• Growth rate: Moderate
• Pets: Mildly toxic, so keep pets from chewing on it.
• Traits: aquatic plant, summer bloomer, fruit bearing, beginner friendly
• Also known as: Water Chestnut, Japanese Water Nut

Care Guide

• Light: Grows well in bright indirect light.
• Watering: Maintain a consistent water level and prevent the water from drying out.
• Soil: Suitable in muddy or aquatic soil.
• Humidity: Prefers high humidity.
• Temperature: 18~27°C
• Fertilizer: Apply aquatic plant fertilizer moderately during the growing season.

Common questions

How often should you water Trapa japonica?

Maintain a consistent water level and prevent the water from drying out. Roughly every 7 days is the baseline; adjust for the season and the spot it sits in.

Where should you keep Trapa japonica?

It likes Grows well in bright indirect light.. You can grow it outdoors. Use Suitable in muddy or aquatic soil..

Is Trapa japonica safe around pets?

Mildly toxic, so keep pets from chewing on it.

Is Trapa japonica good for beginners?

Difficulty: Moderate. Keep it around 18~27°C. Humidity: Prefers high humidity.. Fertilise Apply aquatic plant fertilizer moderately during the growing season..