How to Care for Eichhornia crassipes (Water hyacinth)

Korean name: 부레옥잠

This aquatic plant floats on the water's surface and features beautiful purple flowers. It has excellent water purification abilities and is used in aquariums or ponds.

Key facts

Care Guide

Detailed care guide

Water hyacinth is an aquatic plant known for its beautiful purple flowers. Floated on water, it also helps purify water quality.

Watering

Water hyacinth needs to stay floating on water at all times to grow healthy. Change the water often to keep it clean. If the water becomes polluted, the leaves can turn yellow or mushy.

Light

It likes a range of light, from bright direct sun to indirect light. If light is lacking, the stems can grow leggy and the flowers may not bloom well. In a bright spot, it grows even better.

Humidity

As an aquatic plant, you don't need to worry much about humidity. It isn't affected even if indoor humidity changes.

Temperature

It grows well between 18–30°C. Growth can suffer or leaves can be damaged at too low or too high a temperature.

A common first-timer mistake

The most common mistake is not changing the water in time. Change it often so it doesn't get cloudy, to prevent rot or leaf damage.

If you have pets

Water hyacinth has no known toxicity to pets. That said, eating too much of any plant can cause an upset stomach, so move it out of reach if your pet chews on it habitually.

Care by Season

Water hyacinth is sensitive to temperature changes, so it needs attention as the seasons shift. In spring and summer, growth and blooming are active, so give it plenty of light and water. As temperatures drop in fall and winter, growth slows, so keep it indoors at a stable temperature and make sure the water quality doesn't deteriorate.

Common Problems and Fixes

If the water becomes polluted, the leaves can turn yellow or mushy. Also, if light is lacking, the stems can grow leggy and flowering may decrease. If you notice these changes, replace the water and move the plant to a brighter spot.

Repotting and Propagation

Water hyacinth grows hydroponically on the water's surface without soil, so repotting isn't needed. A healthy plant will propagate over time, spreading new plants across the water. If it multiplies too much, you can thin it out and manage it as needed.

Who It's Great For

It's a great recommendation for anyone who finds regular watering or soil care a hassle. It's easy to grow, so it's a good choice for beginners looking to decorate an indoor water feature or aquarium. It's also a great fit for anyone who wants both beautiful flowers and help with water quality.

Written by AI from the care facts in this entry. Treat it as a starting point.

Common questions

How often should you water Eichhornia crassipes?

Always keep it floating in water. Change the water frequently to maintain cleanliness. Roughly every 1 days is the baseline; adjust for the season and the spot it sits in.

Where should you keep Eichhornia crassipes?

It likes Bright direct sunlight to indirect light. You can grow it outdoors. Use Hydroponic (no soil needed).

Is Eichhornia crassipes safe around pets?

No known toxicity, so it is fine to keep around pets.

Is Eichhornia crassipes good for beginners?

Difficulty: Easy. It is forgiving enough for a first plant. Keep it around 18~30°C. Humidity: No humidity requirement for aquatic plants. Fertilise Once a month with aquatic plant fertilizer.