What is Kohleria bogotensis?

Kohleria bogotensis Nicholson (syn. Kohleria amabilis Fritsch, Isoloma bogotense var. amabile, Tydaea amabilis) is a scaly-rhizomatous perennial belonging to the family Gesneriaceae. Its genus name Kohleria was given in 1848 by Édouard Regel in honour of Johan Michaël Kohler, a Swiss natural history teacher. Its epithet bogotensis indicates its place of origin — Bogota, Colombia — and its synonym amabilis simply means "ravishing" in Latin — a fully justified designation.

It is native to Colombia, in the department of Cundinamarca (Bogota region), and Central America, in montane tropical rainforests. The genus Kohleria includes about fifty species — all covered in characteristic down — of rhizomatous perennials or sub-shrubs from Central and South America. K. bogotensis is one of the parental species behind the many horticultural hybrids of the genus, alongside K. digitaliflora and K. eriantha.

What are the unique characteristics of Kohleria bogotensis?

• Spectacular bicolour flowers — red and cream-yellow spotted: the ornamental signature of this species. The pendant urceolate tubular flowers present two distinctly beautiful parts: a long upper tube of vivid red-carmine to red-orange, entirely covered in dense down giving it a velvety satin appearance — and a flared lower corolla with 5 rounded lobes curved outward, of a cream to pale yellow colour abundantly spotted and striped with burgundy-red to carmine dots and veins, with a luminous orange centre. The combined chromatic effect is extraordinarily rich.
• Decorative bicolour downy foliage: the leaves are lanceolate to oval, downy, slightly lustrous on the upper surface — a dark glaucous green traversed by raised veins — and a pronounced deep purple to brownish-violet on the underside. This face/underside bicolour is particularly visible in our nursery photographs and provides a permanent ornamental asset even out of flower.
• Purplish-red downy stems: the stems are pubescent and purplish-red in colour, extending the plant's colour effect across its entire structure. Each stem carries one to several pendant flowers on short downy peduncles.
• Late summer flowering: K. bogotensis flowers mainly in late summer, producing several simultaneous flowers in axillary cymes. Flowering renews progressively over several weeks.
• Spreading clump habit, 25 to 45 cm: the plant forms a compact bushy clump, well branched, with moderate but generously flowered development.
• Scaly rhizomes — winter dormancy organ: like all Kohleria, it produces scaly rhizomes (also called "cayleux") enabling winter dormancy and vigorous spring regrowth. These rhizomes are easily dividable for propagation.
• Entirely covered in down: the generic characteristic of all Kohleria — the entire plant is covered in fine down: leaves, stems, petioles and even the reverse of the flowers. This velvety texture is a unique tactile quality among indoor plants.

How to grow Kohleria bogotensis?

• Light: partial shade — the indispensable condition. In its natural habitat of Colombian mountain forests, it grows under the tree canopy in diffuse, abundant light. A very bright window without direct sun (east or north-east facing) or a greenhouse with shade cloth is ideal.
• Substrate: draining, fresh, fertile, acidic to neutral mix. Recommended formula: humus-rich compost + peat + granules or perlite. Repot annually in a shallow pot suited to horizontal rhizome development.
• Watering: non-calcareous water at room temperature, without wetting the foliage. Allow the substrate to dry slightly between waterings — this dry/wet alternation promotes rhizome (cayeux) development. Reduce very significantly from October to February.
• Temperature and humidity: minimum 10°C. Humid atmosphere required — misting, pebble tray or grouping with other plants. USDA zones 10-11.
• Feeding: apply a flowering plant fertiliser every 2 to 3 weeks from April to August. No feeding from September to March.

What are the care requirements?

• Winter dormancy (October to February): key to successful cultivation. Keep the substrate just slightly moist and the pot in a cool location (10–15°C). The plant may partially dry out — this is normal and expected.
• Spring restart: repot in March-April in fresh substrate, move to a warm, bright location, gradually resume watering. Growth resumes rapidly.
• Humidity: humid atmosphere is essential — avoid placing the plant near a radiator or in a dry draught.

Where to grow Kohleria bogotensis?

• In a partially shaded greenhouse or conservatory: its ideal cultivation habitat. Filtered brightness and maintained humidity allow generous flowering and beautiful persistent foliage.
• Indoors in a bright but indirect position: east- or north-east-facing window, away from draughts and direct heat sources.
• In a Gesneriaceae collection: combined with Kohleria digitaliflora (pink tube / green spotted lobes) and other collection Gesneriaceae, it forms a striking chromatic duo with its red/cream spotted flower — the two species complementing each other perfectly.
• In an elevated pot or hanging basket: its pendant flowers are particularly well showcased from an elevated position, allowing them to be admired from below.

What are the advantages for collectors?

• A unique red/cream spotted bicolour: the contrast between the velvet red-carmine tube and the cream-yellow lobes densely dotted with burgundy-red is an incomparably rich chromatic combination in the indoor plant world.
• Decorative bicolour green/purple foliage year-round: even out of flower, the plant remains ornamental through its downy glaucous-green foliage with deep purple undersides — a permanent collection asset.
• The "ravishing" parental species of modern hybrids: growing K. bogotensis means possessing one of the founding parental species of the entire genus's horticultural lineage — fittingly named amabilis ("ravishing") since the 19th century.
• A unique velvety texture among indoor plants: the entire plant — leaves, stems, flowers — is covered in dense down, making it unique to the touch in any indoor plant collection.

How to propagate Kohleria bogotensis?

• By clump division and cayeux (rhizome) separation: March-April, at spring repotting — simplest and most effective method. Gently separate the cayeux ensuring each section has a growth eye.
• By stem cuttings: take 8–10 cm sections, allow to callus for a few hours, then plant in moist sandy substrate or root directly in water (add a piece of charcoal). Rooting in 10–15 days.