Hygrophila Angustifolia care guide
Hygrophila Angustifolia (Hygrophila angustifolia) — medium light, 22-28 °C, pH 6-7.5, no CO2.
Compiled by Aquairi from published sources · Published · Updated
Overview
Hygrophila Angustifolia (Hygrophila angustifolia) is an aquatic plant of the family Acanthaceae, listed in the Aquairi knowledge base as a beginner-level species. It is typically grown under medium light and without obligatory CO2 injection on any substrate. A tall, elegant stem plant with very narrow, willow-like leaves that create a graceful, flowing background. Grows rapidly and needs frequent trimming to maintain shape in smaller aquariums.
Taxonomy
- Family: Acanthaceae
- Genus: Hygrophila
- Scientific name: Hygrophila angustifolia
- Common synonyms: Willow Hygro
Habitat
Hygrophila is a genus of Acanthaceae from tropical Asia and Africa, occurring in marshes, river margins and seasonally flooded plains. The genus contains both robust stem species and small creeping forms. In the Aquairi knowledge base, populations associated with this form are recorded from Southeast Asia.
Growth requirements
- Lighting: medium
- CO2: not required
- Temperature: 22-28 °C (72-82 °F)
- pH: 6-7.5
- GH: 3-12 °dGH
- Substrate: any
- Maximum height: 60 cm
- Growth rate: fast
- Recommended placement: background
Placement
Stem species form quick background bushes; smaller and variegated forms sit in the midground or attach to wood as facultative epiphytes. In the Aquairi knowledge base this form is recommended for the background under medium light and without obligatory CO2 injection, using any substrate.
Propagation
Propagated by cuttings and by lateral shoots from the base; rhizome-attached forms divide easily. Documented propagation techniques for this entry include: stem cuttings.
Common issues
Rapid stem species can shade slower neighbours; regular trimming and replanting tops maintain healthy bottom growth.
Propagating Willow Hygro (Hygrophila Angustifolia)
Overview
Willow hygro (Hygrophila angustifolia) has long, slender leaves that look like those of a willow tree and elegantly sway in the current. Its tall, bushy form is ideal for filling the background of a planted aquarium. As a stem plant it grows quickly when given plenty of nutrients and is easy to propagate to other tanks.
Propagation Method (Cuttings)
Willow hygro is multiplied by stem cuttings. Topping a stem prompts the cut tip to root and the remaining base to branch, so a single plant can quickly be turned into a dense group. Its fast growth makes it one of the easier stem plants to spread between aquariums.
Step-by-Step
- Cut the top 5-10 cm from a healthy stem just below a leaf node with clean scissors.
- Strip the leaves from the lowest 2-3 cm to expose the nodes.
- Plant the bare nodes a couple of centimeters into the substrate, spacing stems for a bushy look.
- Leave the mother stem to send out new side shoots from the base.
- Repeat each trim to steadily expand the background or stock other tanks.
Conditions for Healthy Growth
As a stem plant, willow hygro loves stronger lighting and will grow quickly when given plenty of nutrients. CO2 is not required but supports the fastest, densest growth. The species can also grow emersed above the water surface, which is useful when establishing or recovering cuttings.
Trimming & Maintenance
Because of its rapid growth, willow hygro needs frequent trimming—often every week to ten days—to hold its shape, especially in smaller aquariums. Regular topping keeps the long willow-like leaves swaying gracefully and turns each cut into a fresh batch of cuttings.
Common Challenges
- Outgrowing the tank: in smaller setups it quickly reaches the surface without frequent trims.
- Thin lower growth if the dense canopy shades the stem bases.
- Slower, paler growth under weak light—raise lighting and nutrients to restore vigor.