Also known as Holly-Leaf Naiad · Holly-Leaved Naiad · Spiny Naiad
Slender naiad (Najas major) is an aquatic plant with delicate, submerged leaves, forming dense mats. It's an important habitat for aquatic life.
At-a-glance light, water, soil, and growing conditions from plant data
Moderate to High
75% intensity
Prefers bright, indirect sunlight or moderate artificial lighting. Direct sun can cause overheating and algae issues. Ensure adequate light for photosynthesis.
Requires Submersion
100% intensity
Maintain a consistently flooded environment for optimal growth. Water quality is crucial; avoid pollutants and consider gentle aeration if needed.
Muddy
50% intensity
Moderate
50% intensity
Thrives in temperatures between 18-25°C. Avoid extreme fluctuations. Cooler temperatures may slow growth, while excessively high temperatures can stress the plant.
Low
25% intensity
Nutrients are absorbed from the water. Avoid over-fertilization, which can cause algae blooms. Use very dilute aquatic plant fertilizer only if growth is poor in nutrient-deficient water.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Najas major is an aquatic plant and requires submerged conditions. Maintain a consistently flooded environment in ponds, water gardens, or aquariums. Ensure the water is free of pollutants.
Stagnant water can lead to issues, so a gentle current or aeration may be beneficial, especially in larger setups.
Pruning is generally not required for Najas major unless it becomes excessively dense or starts to overcrowd other aquatic plants. If thinning is needed, simply remove excess stems by hand or with aquatic scissors.
This can be done as needed throughout the growing season to maintain desired density and aesthetics.
Najas major propagates readily through fragmentation and seeds. Broken pieces of stems will often root and grow into new plants. It also produces seeds that can germinate in suitable conditions.
Simply allow mature plants to release seeds into the water, or intentionally break off healthy stem sections.
Repotting is not applicable to Najas major as it is a free-floating or loosely rooted aquatic plant. It does not require a traditional pot or substrate.
If growing in a specific area or substrate, you may need to secure it initially. Otherwise, it will establish itself naturally within the aquatic environment.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Slender Naiad (Najas major)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Alismatales |
| Family | Hydrocharitaceae |
| Genus | Najas |
| Species | Najas major |
Similar in genus Najas
Answers based on plant encyclopedia data
