About the species

Sagittaria subulata from South America is a grass-like runner plant that forms dense, low mats with short stolons. The leaves are strap-shaped and fresh green, and the plant usually stays under ten centimetres. Older specimens can, however, suddenly shoot upwards and reach as much as 50 centimetres. Now and then it sends up a flower stalk and opens small white flowers just above the water surface.

Facts

• Latin name: Sagittaria subulata
• Plant type: Runner plant
• Origin: South America
• Height: 5–30 cm
• Growth rate: Medium
• Position: Background

Light requirement

Low light requirement. It manages with the lighting that comes with most aquariums and is happy in partial shade behind or beneath taller plants. Strong lighting does not harm it, but raises the risk of algae on the leaves because the plant cannot use all the available light.

CO₂ & nutrition

Added CO₂ is recommended — Tropica reckons 6–14 mg/l as a medium requirement. The plant can be grown without, but then grows more slowly and loses some of its colour. Supplement with liquid fertiliser weekly and keep iron and potassium levels up.

Planting

Plant the individual plants with their roots in the substrate and the crown free above it. The plant then spreads by itself with runners beneath the substrate and gradually fills out the area, so leave room around each plant from the start.

Rinse all the gel off in lukewarm water before planting, otherwise it can cause bacterial cloudiness. The cup holds many small plants — divide them up and plant them in several portions.

Care & propagation

Thin the runners where you do not want them and move the daughter plants where you want more. Cut them free with scissors rather than pulling, so the mother plant's roots stay put. A nutrient-rich substrate makes it spread considerably faster.

Position in the aquarium

Given its mature height it belongs at the back or along the sides, where it forms a dense wall of greenery and hides equipment. In a smaller aquarium it can also be used as a solitaire in one corner.

Difficulty level

🟢 Easy — grows in most aquariums without CO₂ and under ordinary lighting.

Delivery format

Delivered as 1-2-Grow! — a laboratory-grown cup holding many small plants in nutrient gel. Because the plant is cultivated in vitro it is completely free of snails, algae, planaria and pesticides, which makes it the safest choice for a shrimp aquarium.

Recommendation

An easy way to get a green mat at the front even under modest lighting — set the plants two to four centimetres apart and let the runners do the rest. If it grows too tall, move it further back and it usually settles down again.