Waterweed
Elodea canadensis
aquaticWaterweed is a fast-growing, fully submerged stem plant with small linear leaves arranged in whorls along slender stems. It is highly effective at oxygenating water and controlling algae by competing for nutrients, making it popular in aquariums and outdoor water gardens. This hardy plant spreads easily and can become weedy in natural waterways.
Common Problems
Select the problem your Waterweed is experiencing to get a treatment guide.
Care Guide
light_mode
Light
Requires bright indirect light; 8–10 hours daily. Tolerates moderate light but may grow more slowly.
water_drop
Water
Maintain water temperature between 50–70°F (10–21°C). Prefers cool to moderate water; adapts to various pH levels.
compost
Soil
No soil required; fully submerged. Can root in substrate but also floats freely.
science
Fertiliser
Minimal fertilizer needed. Thrives in nutrient-rich water; add liquid fertilizer only if water is very nutrient-poor.
thermometer
Temperature
Hardy in cool water; prefers 50–70°F (10–21°C). Tolerates occasional temperature dips.
humidity_percentage
Humidity
Requires fully submerged conditions. Thrives in aquariums and outdoor ponds.
Toxicity
check_circleSafe for Catscheck_circleSafe for Dogscheck_circleSafe for Children
Non-toxic to humans and pets. Completely safe for all aquatic environments and herbivorous fish.
Common Pests
Seasonal Care
local_floristspring
Resume regular watering and feeding as growth picks up.
light_modesummer
Peak growing season. Water and feed regularly.
ecoautumn
Reduce watering as growth slows. Stop heavy feeding.
ac_unitwinter
Minimal watering and feeding. Protect from frost if needed.