Air Plant
Tillandsia · Tillandsia
It needs no pot and no soil. In the wild it clings to bark, rock or a wire frame and drinks water and nutrients straight out of the air, through silvery scales on its leaves. A whole genus of around 650 species, sold as a single piece of décor.
Family
Bromeliaceae
Origin
The Neotropics
In the wild
No soil, clings to bark
Indoors
5–30 cm
Growth
Slow
With pets
Non-toxic
Where it's from
The Neotropics, from the southern US to Argentina
Lives on air
It perches on bark or rock and takes everything from rain, fog, dew and airborne dust, not from a host.
Spanish moss is one
T. usneoides, the Spanish moss draping live oaks across the US South, is a Tillandsia. It is not a moss at all.
Outdoors: zones 9–11
Frost-tender for most species. Mounted in trees and shade houses in warm, humid climates.
It needs no soil at all
An air plant clings to driftwood, rock or a wire frame and drinks water and nutrients straight out of the air, through silvery trichome scales on its leaves. The more arid the species, the fuzzier and more silver the leaves. And it blooms exactly once in its life, then slowly dies, handing off to the pups at its base.
The scales do the feeding
Tiny silvery trichomes absorb water and nutrients directly from the air. There are no feeding roots.
It reproduces by dying
Each rosette flowers once, then dies, leaving offsets so the plant renews itself as a clump.
The king was nearly wiped out
T. xerographica was collected so heavily for 1980s décor that it is now CITES-protected.
How to keep it
LightBright, indirect
An east or south window with filtered sun. Direct midday sun scorches. Deep interiors are too dark.
WaterSoak, then dry fast
Submerge in tepid water for 20–30 minutes about weekly, then shake out the rosette and let it dry fully within about 4 hours.
HumidityAirflow matters mostModerate to high humidity helps, but air circulation matters more. Humidity without airflow causes rot.
Temperature18–29°C by dayWarm by day, cooler at night. Growth is poor and rot risk rises when cold. Not frost-hardy.
SoilNone at allNever plant it in soil. Mount it on bark, cork, wood, rock or wire so it can dry out completely.
FeedingLight, in soak waterA dilute, low-copper bromeliad feed in the soak water once or twice a month in growth. Copper is toxic to bromeliads.
DifficultyEasyBeginner-friendly, as long as it dries out fast after every soak.
With petsNon-toxicNot on the ASPCA toxic lists. Still, chewing can cause mild upset and the stiff leaves are a choking risk.
PropagationOffsetsAfter blooming it produces pups at the base. Leave them to clump or separate once each is about a third of the mother's size.
RepottingNeverSoil-free, so there is nothing to repot. Just re-mount if it comes loose.
What the data says
What it costs
A true commodity gift plant at the genus level, with a modest collector market for the big and unusual species.
$3–8
Large xerographica specimens run about $30–70 and up, and named hybrids and fuzzy tectorum sit in between.
IUCN · Genus mostly unassessed
In the wild
The cheap windowsill plant and the endangered one are the same genus.
The flagship T. xerographica, the king of air plants, was over-collected so heavily for the 1980s and 90s décor craze that it was nearly stripped from the wild, and is listed Endangered. Four species sit on CITES Appendix II. Regulated nursery propagation now supplies legal plants, so the one on your shelf can be sustainable.
When it sulks
Falls apart, mushy centreRot. It stayed wet too long, or sat in trapped water after soaking. The number one killer.
Dry, curling, crispy leavesUnderwatering. Soak longer or more often, especially the green forest types.
Brown, bleached tipsToo much direct sun, or mineral-heavy water. Switch to filtered light and rain or distilled water.
No blooms or pupsToo little light, or the plant simply has not matured. Bloom is a once-in-a-lifetime event.
PestsScale and mealybugs occasionally, but rare. No soil means no fungus gnats.
Varieties & company
The varieties
IonanthaSpanish MossPink QuillTectorumXerographica
Pairs with · keep apart from
Staghorn FernOrchidsBromeliadPeace LilyFernsCalathea
A new plant, every week.
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