Aquatic PlantsBeginner🌗 Medium light

Dwarf Sagittaria

Sagittaria subulata · also called Dwarf Sag, Awl-leaf Arrowhead, Narrow-leaved Arrowhead, Ribbon Wapato

🐾 Pet-safe

Generally non-toxic to cats and dogs.

A grass-like rosette plant resembling a miniature Vallisneria, prized for forming a low foreground-to-midground carpet via runners. Hardy and beginner-friendly in low-tech tanks.

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Quick facts

Category	Aquatic Plants
Family	Alismataceae
Native origin	Eastern North America (Atlantic and Gulf coasts)
Care difficulty	Beginner
Light	Medium light
Pet toxicity	Pet-safe

Light

Medium to high light gives the shortest, densest carpet and the fastest runner spread; under low light it survives but grows taller and more sparsely as it reaches for light.

Water

Temp 18-28 C (64-82 F), pH 6.5-7.8, soft to hard water (it tolerates and even appreciates harder, more alkaline water with some calcium). Adaptable; light water-column dosing supports growth.

Soil & potting

A rooted rosette plant (NOT an epiphyte): plant individual rosettes with the crown at the substrate surface (do not bury the crown). A root feeder that responds well to nutrient-rich substrate or root tabs in inert sand/gravel, which speeds the carpet.

Environment — humidity, temperature, placement

CO2 is optional; it carpets in low-tech tanks but CO2 keeps it shorter and denser. Moderate flow. Foreground-to-midground placement. Sold emersed or submersed; may melt slightly when converting, then sends out runners to fill in.

Propagation

Spreads quickly by runners that produce daughter rosettes, forming a connected carpet. Separate and replant rooted runners to direct or expand coverage; trim leaf tips to manage height.

Toxicity detail

Non-toxic and safe with fish, shrimp, snails, and pets. Not federally restricted in the US, but it is naturalized/invasive in parts of Europe and a vigorous spreader, so never release it into natural waterways; dispose of excess in the trash.

Growth stages

How this plant changes through its life — each stage often has its own care, diet and space needs.

Photo coming soon

Spore / recruit

Aquatic plants and macroalgae establish from spores, seeds, or drifting fragments that settle and attach to substrate or rock. Many freshwater aquarium plants and marine macroalgae also spread readily from a detached piece that takes root or holdfast.

Photo coming soon

Young growth

Young growth puts out its first blades, fronds, or leaves and anchors with roots or a holdfast. Submersed plants may look different from their emersed form, and growth speeds up as the plant adapts to the water's light and nutrients.

Mature

A mature aquatic plant or macroalga reaches its full size and characteristic shape, forming the dense growth, runners, or fronds typical of the species. Established plants spread to fill space and can be divided or trimmed to propagate.

Sources

Tropica - Sagittaria subulata (care guide)
Wikipedia - Sagittaria subulata (encyclopedia)