Water Wisteria/Hygrophila Difformis

Quick facts

Identity

Also known as

Water sprite (misapplied); Synnema

Synonyms

Synnema triflorum

Environment

Freshwater

Native to

India, Bangladesh, Nepal, Myanmar, Thailand, Malay Peninsula

Habitat

Marshes, ditches, slow-moving streams and shallow seasonal wetlands in tropical Asia, rooting in mud with emersed shoots above the waterline

Sourcing

Aquacultured

Conservation

Not Evaluated

Care

Care level

Easy

Growth form

Stem

Max height

4 – 20 in (10 – 51 cm)

Spread

8 in (20 cm)

Growth rate

Fast

Placement

Midground, Background

Water

Temperature

70 – 82 °F (21 – 28 °C)

pH

6.0 – 7.5

GH

2 – 18 dGH

dKH

2 – 21 dKH

PAR

40 – 80 PAR

Flow

Low-Moderate

Light

Medium

CO₂

Beneficial

Planting

Substrate

Any

Feeds from

Both

Fertilizer needs

Medium

Colors

Green

Feeding & breeding

Propagation

Cuttings

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Care guide

Overview

Deeply lobed, feathery green leaves branch along upright stems that fill in as a dense midground or background mass. Undemanding and fast growing, it adapts to low or high light, roots easily from cuttings pushed back into the substrate, and pulls heavily on water-column nutrients, making it a practical nitrate sponge for newly set up tanks.

Care

Water wisteria is among the least demanding stem plants and tolerates a wide range of lighting, from low to high, though medium to high light produces the finest, most deeply cut leaf form. It grows equally well with or without added CO2, though supplementation speeds growth and tightens the lacy leaf shape. Regular trimming keeps the stems bushy rather than leggy, and the tops can simply be pushed back into the substrate to continue the row.

Planting & trimming

Plant stems in small groups directly into the substrate, spacing them a couple of inches apart so they fill in as they branch. The plant can also be left to float, in which case it forms surface mats and roots readily from any broken fragment. Trim the tops regularly once they near the surface and replant the cuttings to keep growth dense rather than sparse and elongated.

Fertilizing

As a fast grower it draws heavily on the water column for nitrogen and other nutrients, making it a useful nutrient sponge in freshly set up tanks. A weekly all-in-one liquid fertilizer supports steady growth, and root tabs help if the substrate itself is nutrient-poor. Iron and other micronutrients should not be neglected, since deficiency shows up quickly as pale or yellowing new leaves.

Propagation

Propagation is simply done by cutting the upper portion of a stem and replanting it in the substrate, where it roots within days and resumes strong growth. The lower portion left behind typically responds by throwing out multiple lateral shoots, thickening the original planting. Floating fragments will also root and grow, making this one of the easiest aquarium plants to multiply.

Problems

Newly introduced stems, especially those grown emersed at the farm, often drop their simple above-water leaves within a couple of weeks after planting; this apparent melt is normal and is followed by the characteristic feathery submersed foliage. Stems planted too deep or into a compacted, anaerobic substrate can develop mushy, blackened bases and should be trimmed back and replanted. Weak or leggy growth with thin, less-lobed leaves usually points to insufficient light rather than disease.

Sources

1. Hygrophila difformis - Water Wisteria - Flowgrow Aquatic Plant Database
2. Water wisteria (Hygrophila difformis) - Scale & Stem
3. Water Wisteria (Hygrophila difformis) Care Guide — Shoal & Stem
4. Water wisteria care: light, CO2 and placement · TankBud

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