Also known as Eurasian Spiked Water-Milfoil · Eurasian Watermilfoil · Myriophylle En Epi
Eurasian Water-Milfoil (Myriophyllum spicatum) is an invasive aquatic plant forming dense mats that impede water flow and harm native ecosystems.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers bright, indirect light. Direct sunlight can encourage excessive algae growth. Aim for at least 6-8 hours of light per day.
Fully Submerged
75% intensity
Requires freshwater environments, from shallow ponds to deeper aquariums. Ensure adequate water depth for optimal growth.
Muddy
50% intensity
Moderate
50% intensity
Tolerates a wide range of temperatures, typically between 15-25°C (59-77°F). Avoid extreme fluctuations.
Aquatic
50% intensity
Low
25% intensity
Nutrient uptake is primarily from water. Fertilization is rarely needed in established, nutrient-rich environments.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic to pets and humans.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Myriophyllum spicatum thrives in slow-moving or still freshwater environments. Ensure the plant is fully submerged in water with a depth that allows its foliage to reach the light source.
Regular water changes are not typically necessary for established aquatic plants, but monitor for any signs of algae overgrowth.
Pruning Myriophyllum spicatum is essential to control its rapid growth and prevent it from becoming invasive. Trim stems regularly to maintain desired size and density. Cuttings can be used for propagation.
Remove any decaying or overly dense sections to promote healthier growth and better water circulation.
Propagation is very easy and primarily occurs through fragmentation and stem cuttings. Simply cut a healthy stem into sections, each with at least a few leaves and an inch or two of stem.
These fragments will readily root and grow into new plants, often within weeks.
Repotting is generally not applicable as Myriophyllum spicatum is an aquatic plant that grows submerged in water. It can be planted directly into the substrate of a pond or aquarium, or allowed to float freely.
If using substrate, ensure it is nutrient-poor to avoid excessive algae growth.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Eurasian Water-Milfoil (Myriophyllum spicatum)
Where Eurasian Water-Milfoil (Myriophyllum spicatum) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Saxifragales |
| Family | Haloragaceae |
| Genus | Myriophyllum |
| Species | Myriophyllum spicatum |
Similar in genus Myriophyllum
Answers based on plant encyclopedia data
