Tillandsia harrisii

A silver Tillandsia endemic to Guatemala

Tillandsia harrisii is endemic to Guatemala and was published by Renate Ehlers in 1987. The type locality is recorded on rocks near the Río Teculután in Zacapa at about 500 m elevation.

Its dense pale trichomes absorb water across the leaves and reduce moisture loss between wettings. On its exposed rocky sites, the rosette receives strong light, thorough wetting followed by rapid drying, and constant air movement.

Growing Tillandsia as air plants

Light

Give Tillandsia harrisii strong light directly at an east, south or west window. Good light keeps the rosette compact, stiff and pale.

Watering

Roots provide attachment only. Fasten the rosette loosely to cork, dry wood, inert stone or an open wire frame, keeping its base uncovered and ventilated. Thoroughly rinse or briefly immerse the plant with low-mineral water once it is fully dry and the leaves feel slightly less resilient. Severe repeated drought makes tips brittle and the rosette curl inward.

Fertilising

Use air-plant or bromeliad fertiliser at a very low dose in an occasional full wetting during active growth. The trichome-rich leaves absorb nutrients efficiently, so more is not better.

Repotting, root care and humidity

This air plant is not repotted in soil. Move it to a larger or more open mount when the rosette or its offsets lose airflow, the holder presses on the base or drying becomes awkward.

Handling and trichome care

Handle by the firmer lower leaves with clean, dry hands and avoid rubbing the velvety silver coating. Trim only fully dry tips to their natural taper and remove an old inflorescence after it dries.

Troubleshooting Tillandsia harrisii

• Leaves look pale, soft and densely frosted: The heavy covering of silver water-absorbing scales is a healthy feature of Tillandsia harrisii. It protects the plant and helps it take up water, so avoid rubbing or polishing the leaves.
• Brown tips spread after weeks in a hot bright spot: The plant is likely drying faster than it is being rehydrated. Water thoroughly, drain fully and move it out of scorching afternoon sun while keeping good air movement.
• The centre becomes dark and leaves detach: This is consistent with crown rot, commonly caused by water sitting in the rosette while airflow is poor. Remove loose dead material and keep the surviving firm tissue dry and ventilated.
• Cottony patches sit above the natural silver surface: Mealybugs form raised, localised clumps that can be teased away, unlike the even fixed silver scales. Isolate the plant and repeat treatment using our mealybug guide

Tillandsia harrisii 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.

What does the name Tillandsia harrisii mean?

Tillandsia honours the Finnish physician and botanist Elias Tillandz. The epithet harrisii honours American Tillandsia collector and exporter Bill Harris.

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

Renate Ehlers first described Tillandsia harrisii in 1987 in Bromelie, volume 1987, page 34.