Begonia rex 'Red Kiss'

Begonia rex 'Red Kiss'

Small-leaved Begonia rex 'Red Kiss' has a tight, compact habit and rounded asymmetrical leaves. A shallow rhizome forms a low clump, making the repeated leaf pattern especially clear when viewed from above.

Each rounded to asymmetrical leaf carries a bright red to metallic red zone, usually framed by a dark centre and dark outer edge. The colour can shift with season and growing conditions, with cooler active growth often bringing stronger red tones and summer heat sometimes softening the intensity.

Red Kiss colour and leaf shape

• Compact small-leaved rex begonia with a low, mounded shape
• Metallic red foliage with dark central and marginal markings
• Rounded, asymmetrical leaves arranged closely from the rhizome
• Suited to shallow pots and bright filtered indoor light
• Low clumping growth from a shallow surface rhizome

Compact rex growth and metallic foliage

Begonia rex 'Red Kiss' forms a neat small-leaved rhizomatous clump, with leaves held close together above the shallow rhizome.

Rex begonias are rhizomatous Begonia hybrids with Begonia rex ancestry. Wild Begonia rex occurs from southern Bhutan into northern Myanmar, growing as a rhizomatous geophyte in subtropical conditions. Cultivated rex begonias need warmth, filtered light, careful moisture, and protection from cold wet substrate.

Care for metallic red rex leaves

• Light: Bright filtered light produces shorter petioles and sharper red-to-dark contrast. A position away from direct midday sun reduces scorch and pale patches on metallic red leaves.
• Watering: Water when the top 2–3 cm of substrate is dry. The plant prefers even moisture around the fine roots, with a drier surface around the rhizome between waterings.
• Substrate: Use an airy, slightly moisture-retentive mix with perlite, fine bark, pumice, or coco chips. Drainage is important because the rhizome sits close to the surface.
• Humidity: Keep humidity around 50–70% with gentle air movement. Stable air moisture reduces dry edging.
• Temperature: Keep at 18–24°C, with a minimum around 13–15°C. Cold wet conditions are especially damaging to compact rex begonias.
• Potting: Use a shallow pot with drainage holes. A pot that is too deep can hold moisture below the root zone for too long.
• Feeding: Apply diluted balanced fertiliser every 3–4 weeks while growth is active, and rinse the substrate occasionally with plain water.
• Grooming: Remove ageing leaves at the base to keep airflow around the crown and expose new growth.
• Propagation: Leaf cuttings, leaf wedges, and rhizome division can be used in warm, humid propagation conditions.
• Mineral substrates: Mineral culture needs stable moisture, mild nutrient strength and steady warmth around the root zone.

Leaf edge, crown and root checks

• Faded or dull red tones: Check seasonal heat, light level, and overall plant health. Colour can soften during hot periods, while stressed roots can also reduce leaf quality.
• Blackened soft leaf bases: Look for water sitting in the crown or a cold wet rhizome. Water around the pot edge and improve airflow.
• Dry brown margins: Check humidity, watering gaps, and fertiliser salts. Small leaves can crisp quickly after repeated dry spells.
• Fine pale speckling: Inspect the underside of leaves for spider mites or thrips, especially during warm indoor periods.

Safe handling of propagation pieces

During repotting or propagation, keep Begonia rex 'Red Kiss' rhizome pieces away from pets and children. Begonia species and hybrids contain soluble calcium oxalates, with underground parts carrying the highest risk. Wash hands after cutting or dividing the plant.

Red Kiss and rex Begonia background

Begonia is named after Michel Bégon and sits in Begoniaceae. The epithet rex means “king” in Latin and is linked to Begonia rex, the species behind the cultivated rex begonia group. 'Red Kiss' is the cultivar name for this metallic red selection.

Begonia rex 'Red Kiss' forms a compact clump of metallic red leaves with dark centres and dark outer margins.