Inch Plant
Tradescantia zebrina · Wandering Dude
A fast trailing plant from the moist forest floors of Mexico and Central America, its leaves banded with silver over green and purple, glowing magenta underneath. A snapped-off piece roots within days, which is why it is dirt cheap, and a banned invader where it escapes outdoors.
Family
Commelinaceae
Origin
Mexico
In the wild
Mats the forest floor
Indoors
Trails 0.1–0.5 m
Growth
Fast
With pets
Toxic
Where it's from
Mexico to Colombia
Forest-floor carpet
Grows in thickets on damp, shaded ground and river banks, up to about 2,000 m.
Outdoors: zones 9–11
Frost-tender. A houseplant or shaded summer patio plant in cooler climates.
Banned in South Africa
A Category 1b invader. Planting, propagating or trading a cutting is illegal there.
Contraband in another hemisphere
A single snapped-off piece dropped on damp soil roots within days. That ease is why it is free at every plant-swap, and why it is a Category 1b banned invader in South Africa and invasive in the Galapagos, where it smothers native ground flora. The cheapest plant on the shelf is contraband elsewhere.
Roots in days
Every node strikes readily; a broken stem on damp soil takes hold almost at once.
A retired name
Long sold as 'Wandering Jew', a name now widely retired for 'wandering dude'.
A smothering mat
Where it escapes outdoors it forms dense mats that crowd out native plants.
How to keep it
LightBright, indirect
Strong light keeps the purple and silver vivid. Too little washes it toward plain green.
WaterLet the top dry
Water in growth, less in winter. Slightly fleshy stems forgive a missed drink but rot if soggy.
HumidityAverage is fineTolerant, though very dry air can brown the leaf tips.
TemperatureAbove 5–10°CFrost-tender. Protect under glass in cool climates.
SoilLoam-based mixMoist but well-drained. Tolerant of acid, neutral or alkaline.
FeedingMonthly in growthA balanced liquid feed in the growing season, little in winter.
DifficultyVery easyNear unkillable. Faults are legginess in low light and rot from cold, wet feet.
With petsToxicIrritant sap. Causes dermatitis on contact; the ASPCA flags its close cousins as toxic.
PropagationStem cuttingsRoot tip cuttings in water or mix. Each node strikes easily.
RepottingEvery 1–2 yearsGoes woody at the base with age. Most growers just restart from fresh tips.
What the data says
What it costs
About as cheap as houseplants get, and often passed along free as cuttings.
$8–15
Variegated and recolored forms like 'Pink Paradise' step up to roughly $20–40. Not a collector grail.
The air-purifier myth
Marketed as air-purifying on the back of the 1989 NASA chamber study.
100–1,000
plants per room would be needed to match a single open window or one HVAC cycle (Cummings and Waring, 2019). A beautiful fast trailer, not an air purifier.
IUCN · Not assessed
In the wild
The conservation story runs backwards: the plant threatens the ecosystem, not the other way round.
Not threatened anywhere; it is hugely abundant. But it is a Category 1b prohibited invader in South Africa and invasive in the Galapagos, rooting from fragments and forming smothering mats. The danger is the plant to the land.
When it sulks
Leggy, fading colorToo little light. Move it brighter and pinch to force bushy regrowth.
All-green leavesInsufficient light has washed out the purple and silver.
Mushy stemsOverwatering or cold, wet soil. Dry out and improve drainage.
Brown, crispy tipsDry air or underwatering.
Bare, woody baseNatural ageing. Restart from fresh tip cuttings.
Varieties & company
The varieties
Wild typeQuadricolorPurpusiiPink Paradise
Pairs with · keep apart from
PothosPhilodendronSpider PlantCactiSucculentsSnake Plant
A new plant, every week.
The Data Drop from Sheets Works. New field guides like this one, in your inbox.
