Species · genus Justicia · Acanthaceae

Warer Willow

Justicia gendarussa Burm.fil.

Also known as: Daun Rusa · Gandarusa · White Justicia · Willow-leaved Justicia

Growth habit

subshrub or shrub

Native range

Assam, Bangladesh, Cambodia, East Himalaya, India, Laos, Lesser Sunda Is., Malaya, Myanmar, New Guinea, Philippines, Sri Lanka, Sumatera, Thailand, Vietnam

Reference · J. gendarussa

Cultivars of J. gendarussa

The named forms growers keep — each with its own page, each honest about how much we know.

No named cultivars catalogued under J. gendarussa yet. When growers document a stable, named form, it earns its own page here.

Guide

The species-level account. Cultivar pages build on this and say where they differ.

Justicia gendarussa is a tropical Asian subshrub from warm, moist forest margins across South and Southeast Asia, so it wants steady warmth and bright indirect light rather than harsh direct sun. Let the top inch of mix dry before watering; it likes even moisture but resents sitting wet. In most homes medium humidity is sufficient, though it appreciates a little extra moisture in the air.

Care recipe

The species record — the baseline every cultivar inherits unless it says otherwise.

Care notes are early — not yet verified

Light: ai:claude-opus-4-8
Water: ai:claude-opus-4-8 (range 5-10d)
Humidity: ai:claude-opus-4-8
Soil: ai:claude-fable-5
Care: ai:claude-fable-5

Light

Bright, indirect

Water

≈ every 10 days

Humidity

Medium

Temperature

16–32 °C

Soil mix

Fertile, well-draining loamy mix

Propagation

Stem cuttings root very readily

Fertilizing

Balanced liquid feed monthly in the growing season

Growth rate

Fast

Flowering

Small white-to-pink flowers; grown mainly for foliage

ToxicityAuthoritative · species

Not yet documented

This is where toxicity lives — every cultivar of this species inherits it and none can override it.

Reference images

Every image credited. Licenses link to their deeds.

No reference gallery yet

A few clear photos — habit, a mature leaf, a flower if it blooms — would give this page its eyes.

Add images

Sources: ai:claude-opus-4-8 · ai:claude-opus-4-8 (range 5-10d) · ai:claude-fable-5

Kept true by its growers

Every fact here carries its source. Grow Warer Willow yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — is exactly what keeps this page honest. Contributions are reviewed before anything changes.