Tillandsia usneoides

Spanish moss across the American tropics

Tillandsia usneoides is an air-plant bromeliad widely known as Spanish moss. Carl Linnaeus first described it in 1753 and published the current Tillandsia name in 1762. It is native across tropical and subtropical America, from the southeastern United States and the Caribbean to much of Central and South America.

Wild plants hang in long branching curtains from trees and other supports. Mature strands are rootless and gather rain, mist, dust and dissolved nutrients through scales across their entire surface. Their open branching brings humid air and circulation around the stems, and water drains quickly after rain. In the northern part of its range, Spanish moss is especially associated with warm swamps and river forests, often hanging from live oak and bald cypress.

Care for air plants without potting mix

Light

Hang Spanish Moss directly beside an east-facing window or close to a brighter south or west window with fierce midday sun softened. Strong filtered light and some gentle direct sun keep strands compact and silver-green.

Roots and hanging

This species is effectively rootless in display and absorbs water across its leaves. Hang it from untreated wood, cork, plastic mesh or an inert hook without soil, moss or a water-holding container.

Temperature

Maintain steady indoor warmth and protect the freshly watered strands from cold draughts and frost. It tolerates cooler air than many green Tillandsia when dry, but a saturated curtain chills and dries slowly.

Humidity and airflow

Average to moderately high humidity is acceptable, but continuous air movement through the whole curtain determines success. Hang it freely, never sealed in a globe or pressed against a wall.

Fertilising

Use air-plant or bromeliad fertiliser at a very low dose in an occasional full soak or penetrating rinse during active growth. Distribute it through the whole mass, then use plain low-mineral water for subsequent hydration.

Division and renewal

There is no repotting. Divide or redistribute the curtain when the centre stays shaded, airflow cannot pass through or the support becomes overloaded.

Problems and solutions for Tillandsia usneoides

• The plant hangs in thin silver-grey strands: That wiry grey appearance is normal for Tillandsia usneoides. Its tiny leaves are covered in silver water-absorbing scales, so the whole mass should not be dark green or planted in soil.
• The outer strands grow but the centre turns brown: A tight bundle can leave the middle short of light and airflow or prevent it drying after watering. Spread and turn the strands, remove dead material and hang them loosely.
• Strands become crisp and break readily: The plant has probably stayed dry too long or sits in hot sun. Wet the entire mass thoroughly, shake out excess and make sure both the inner and outer strands rehydrate.
• Dark soft sections appear after watering: The bundle is remaining wet for too long. Separate affected strands, improve ventilation and water early enough for the plant to dry fully the same day.
• Cottony clumps differ from the even grey coating: Inspect for mealybugs lodged among the fine stems. Isolate the bundle and repeat treatment carefully, since its dense branching makes complete coverage difficult.

Tillandsia usneoides is non-toxic to people and pets

• This plant is non-toxic to people, cats and dogs.
• Chewing a large amount can still cause an upset stomach.
• If a large amount is eaten and symptoms continue, contact a veterinarian or medical professional.

How did Tillandsia usneoides get its name?

Tillandsia honours the Finnish physician and botanist Elias Tillandz. The epithet usneoides means resembling Usnea, the beard-lichen genus.

Carl Linnaeus established the genus Tillandsia in 1753 in Species Plantarum, page 286.

Carl Linnaeus first described it as Renealmia usneoides in 1753 in Species Plantarum, page 287. Carl Linnaeus later placed it in Tillandsia as Tillandsia usneoides in 1762 in Species Plantarum, second edition, page 411.