Water Hyacinth
Eichhornia crassipes
📖 About this plant
A striking floating water plant with inflated bulbous leaf stalks and attractive lavender-blue flowers with yellow markings. One of the most beautiful floating plants, but also one of the most invasive aquatic species on Earth. Its rapid growth doubles biomass in under 2 weeks, making it excellent for water purification but devastating to natural waterways.
🧑🌾 Care requirements
Full sun (6-8 hrs)
Floats freely on water surface
N/A (fully aquatic)
18-30°C
None required — free-floating on water surface
Absorbs nutrients from water, thrives in nutrient-rich conditions without supplementation
🌐 Common Names
📋 Plant facts
- 🌍 Origin
- Amazon River Basin, South America — now invasive worldwide
- 📏 Max height
- 30-100 cm above water, 50+ cm root length below
- 📐 Spread
- 30-90 cm
- 🕰️ Bloom time
- Spring - Fall
- 🎨 Bloom color
- Lavender, Blue
- 🍃 Foliage color
- Green
- ⏳ Lifespan
- Perennial
- 📈 Growth rate
- Very Fast
- ☠️ Toxicity
- Non-toxic to fish, sap may irritate skin in sensitive individuals
- 🌱 Propagation
- Stolon division — mother plants produce daughter plants on short stolons
🛡️ Health & Safety
Non-toxic to fish, sap may irritate skin in sensitive individuals
Common issues
- Extremely invasive — illegal in many regions
- Clogging waterways and drainage systems
- Mosquito breeding in trapped water among roots
- Dying off in cold temperatures below 10°C
💡 Care tips
- One of the fastest-growing plants in the world
- Floats on water surface with bulbous air-filled stems
- Helps filter and oxygenate pond water naturally
- Invasive in warm climates so never release into wild waterways

