Hydrocharitaceae
Marine naiad
Najas marina
Also known as Marine water-nymph, Saltwater naiad, Najas marina var. genuina, Seashore naiad
Zones 5–9Sun Partial SunWater ModerateCare Moderate
Native Plants · Aquatic · Submerged · Pond Plant · Water Garden · Aquarium · Oxygenating Plant · Najas · Hydrocharitaceae · Freshwater · Brackish
Pet-safe
Currently out of stock everywhereStock updated 9/6/2026
Marine naiad is a fully aquatic submerged plant ideal for ponds, water gardens, and aquariums with moderate light. It thrives in still to slow-moving water and helps oxygenate the aquatic environment. Monitor growth regularly as it can spread vigorously under optimal conditions.
Growing conditions
The details behind the basics
- Daily light
- 4 hours
- Watering
- Maintain fully submerged in clean, well-oxygenated water at appropriate depth · Fully submerged — no separate watering required
- Maintenance
- Moderate
- Soil
- loam
- Soil pH
- 7–7.5
- Temperature
- 0°F to 90°F
- Cycle
- Perennial
- Propagation
- Seed, Cutting
Hardiness
USDA 5a-9b
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Form & growth
Mature size and habit
- Mature height
- 2 ft – 5 ft
- Spread
- 3 ft
- Spacing
- 18 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Algeria, Altay, Amur, Argentina Northeast, Argentina Northwest, Arizona, Aruba, Assam, Austria, Bahamas, Baleares, Baltic States, Bangladesh, Belarus, Belgium, Bolivia, Botswana, Brazil North, Brazil Northeast, Brazil Southeast
Sources: trefle, usda
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