Also known as Alkaline Water-Nymph · Holly-Leaf Naiad · Holly-Leaf Waternymph
Spiny Naiad (Najas marina) is an annual submerged aquatic plant with toothed leaves and a preference for brackish or saline waters.
At-a-glance light, water, soil, and growing conditions from plant data
Moderate
50% intensity
Requires bright, indirect light. Direct sunlight can be tolerated if water is sufficiently deep to prevent overheating.
High
100% intensity
Always keep submerged in water. Prefers stagnant to slow-moving, nutrient-rich aquatic environments.
Muddy sediment
50% intensity
Moderate
50% intensity
Prefers water temperatures between 18-24°C. Tolerates a range but thrives in moderate aquatic conditions.
Low
25% intensity
Nutrient uptake from water is sufficient; avoid over-fertilization which can cause algae blooms.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Maintain consistent submersion in a pond or aquarium. Najas marina thrives in stagnant to slow-moving water.
Ensure the water depth is appropriate for its aquatic lifestyle, typically allowing for full immersion and root contact with substrate if planted.
Pruning is rarely needed for Najas marina. If overcrowding occurs or the plant becomes too dense, you can gently thin out stems.
These removed pieces can be used for propagation, ensuring minimal waste and promoting new growth.
Propagation is effortless as Najas marina readily reproduces via fragmentation and seeds. Simply drop healthy stem cuttings into the water, and they will root and grow.
Seed dispersal also occurs naturally in suitable conditions.
Repotting is not applicable to Najas marina as it is a fully submerged aquatic plant. It is typically anchored in substrate or drifts freely in the water column.
If transplanting, ensure it is placed in a suitable aquatic environment.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Spiny Naiad (Najas marina)
Where Spiny Naiad (Najas marina) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Alismatales |
| Family | Hydrocharitaceae |
| Genus | Najas |
| Species | Najas marina |
Similar in genus Najas
Answers based on plant encyclopedia data
