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Myriophyllum verticillatum
whorled water-milfoil
Myriophyllum verticillatum
Myriophyllum verticillatum, commonly known as Whorled Watermilfoil, is a submerged aquatic plant native to North America and Eurasia. It is characterized by its finely divided leaves arranged in whorls around the stem. It provides important habitat and food for aquatic organisms, and it can also help to oxygenate water. Its presence is indicative of good water quality.
CategoryDetails
Plant TypePerennial plant
Estimated Plant Lifespan3 years lifespan
Sun Requirements4-6 hours direct sunlight (Partial Sun)
Pollination

Method: Water

Notes: This species is primarily pollinated by water, where pollen is released into the water column and drifts to other plants.

Watering Requirements

Method: Submersion

Frequency: Constant submersion

Notes: This plant is fully aquatic and requires constant submersion in water to survive.

Humidity Requirements

Level: High

Maintenance: N/A (fully submerged)

Cleaning RequirementsEnsure adequate lighting and nutrient levels in the water. Prune as needed to prevent excessive growth.
Temperature Range

Min: 10°C

Max: 27°C

Alternative Namesverticillate water-milfoil, Myriophyllum verticillatum pinnatum, Potamogeton verticillatus
Vallisneria americana
American eelgrass
Vallisneria americana
Eelgrass provides shelter and spawning grounds for fish, complementing the habitat provided by Myriophyllum verticillatum.
Sagittaria latifolia
broadleaf arrowhead
Sagittaria latifolia
Arrowhead provides habitat for various invertebrates, contributing to biodiversity and a balanced ecosystem alongside Myriophyllum verticillatum.
Ceratophyllum demersum
coontail
Ceratophyllum demersum

Hornwort can grow rapidly and compete with Myriophyllum verticillatum for nutrients and light, potentially outcompeting it.

Elodea canadensis
Canadian Waterweed
Elodea canadensis

Canadian Waterweed can form dense mats that shade out Myriophyllum verticillatum, reducing its growth and survival.

Aphids

Aphids can occasionally infest Myriophyllum verticillatum, sucking sap and weakening the plant. Look for clusters of small, soft-bodied insects on stems and leaves. Severe infestations can cause stunted growth and discoloration.

Snails

Certain snail species may feed on Myriophyllum verticillatum, causing damage to leaves and stems. Check plants regularly for signs of grazing.

Steps:

    • Take a healthy stem cutting from a mature plant, ensuring it is at least 10 cm long.
    • Remove the leaves from the bottom 2-3 cm of the cutting.
    • Plant the cutting in a suitable substrate, such as aquatic soil or sand.
    • Ensure the cutting is submerged in water and receives adequate light.
    • Roots should develop within a few weeks, and the new plant can then be transplanted.

Beneficial Bacteria Supplements

To maintain a healthy aquatic environment and promote nutrient cycling.

Aquatic Plant Fertilizer Tablets

To provide essential nutrients for growth, especially in nutrient-poor environments. Choose slow-release formulas.