Begonia ‘Macarena’ (Rex Cultorum Group)

The ancestry carried by ‘Macarena’

‘Macarena’ is a stable Rex Cultorum clone recognised by broad blades and deep green, metallic silver and burgundy colouring. Begonia rex supplies the principal wild background to the group from humid, shaded eastern Himalayan sites and contributes to the group’s cultivated diversity.

Successive crosses added tropical rhizomatous Begonia species to the lineage; growers selected the resulting seedlings for stable characters such as broad blades. This cultivar exists only in cultivation; vegetative propagation preserves its growth habit together with deep green, metallic silver and burgundy colouring.

Indoor care for Begonia ‘Macarena’ (Rex Cultorum Group)

Light

A practical home position for Begonia ‘Macarena’ (Rex Cultorum Group) is at an east window. A south or west window also works from 0.5–1.5 m back, provided hot sun does not reach the leaves. Acclimate it gradually, since sudden intense exposure means metallic and pale zones bleach first, followed by dry brown margins. In a shaded shelf position, the petioles elongate, the crown leans and new leaves are smaller with flatter colour contrast. Natural leaf pigments produce the rich pink colouring within the spiral pattern. Growth made in dim light is less distinct, but hot direct sun fades or scars the coloured tissue. Suitable light produces sturdy, normally proportioned new growth with the expected colour.

Watering

Let the upper layer change first, then water Begonia ‘Macarena’ (Rex Cultorum Group) when roughly the upper 2–3 cm has dried and the lower shallow root zone still holds a trace of moisture. Rewet the entire root ball in one pass, allow full drainage and keep the drainage hole clear. Small sips leave dry pockets behind. A cool, saturated pot is especially unsafe for the fine root mat. The rhizome provides limited reserve, so prevent the root ball from drying completely. Use the moisture below the creeping rhizome of ‘Macarena’; a dusty surface can hide moisture lower in the pot. Active growth, warm airflow and terracotta dry the mix faster than cool light, dense substrate or plastic.

Substrate and roots

Plan the potting mix around a low creeping rhizome with most active roots close to the top of the pot. If using ready-made houseplant mix, adapt it to give the same structure as a springy mix of peat-free substrate, small bark and fine pumice or perlite. Replace mix that has collapsed into a wet layer beneath the rhizome. A broad pot only slightly wider than the roots suits the sideways growth better than extra depth. Set ‘Macarena’ with its fine roots in the mix and its creeping rhizome still visible.

Temperature

Warm, even conditions suit Begonia ‘Macarena’ (Rex Cultorum Group): roughly 18–26 °C, staying above 13 °C. Keep both foliage and pot away from night-time glass chill and air-conditioning outlets. A heater under the sill creates uneven drying and can desiccate the window-facing leaves.

Humidity and airflow

Begonia ‘Macarena’ (Rex Cultorum Group) grows best when humidity stays steady. Aim for moderate, steady humidity in a ventilated enclosure with dry leaf surfaces. Around 55–70% suits most active growth. Keep humidity in the air around ‘Macarena’ while leaving its crown and surface rhizome dry. Fresh air matters most after watering, cleaning or while a new leaf is opening.

Fertilising

Match feeding to visible growth in Begonia ‘Macarena’ (Rex Cultorum Group): use a balanced complete fertiliser at quarter strength every four to six weeks. Reduce the dose when light falls, the pot stays wet longer or fresh potting mix already contains fertiliser. Begonia roots are sensitive to concentrated salts, so avoid strong doses and fertilise only after the root ball is moist. The pattern on ‘Macarena’ is not a sign that it needs a stronger dose. Dilute feeding protects the shallow roots.

Repotting

Give Begonia ‘Macarena’ (Rex Cultorum Group) fresh mix once the rhizome reaches or circles the rim, roots fill the shallow pot, watering becomes uneven or the mix loses its open structure. Choose a pot only 2–3 cm wider. A fine Begonia root system performs best without a large volume of unused substrate. Avoid bare-rooting. Each section kept after division must have fine roots and at least one sound growing point. Continue feeding only while temperature, light and active growth support normal nutrient use. Place the growing rhizome end of ‘Macarena’ towards the open side of the new pot and keep its top visible.

Support, pruning, handling and leaf care

Use a shallow, wide pot to manage the mature spread of Begonia ‘Macarena’ (Rex Cultorum Group). Vertical support is unnecessary. Point the active rhizome end towards bare mix and keep roots, a bud and a healthy leaf on any division. Keep the light direction steady while a leaf unfolds, then make any small rotation once it is firm. Dust the spiralled pink leaves of Begonia ‘Macarena’ with a fine brush around the curl. Do not flatten the centre or rotate the plant while a tightly coiled new blade is opening. Snip damaged or spent growth with a clean tool and keep cuts clear of wet substrate.

If Begonia ‘Macarena’ (Rex Cultorum Group) looks unwell

Green, silver and burgundy vary between leaves

The position of all three colours changes naturally across the broad lightly puckered blades. Firm blades can show a different balance of green, silver and burgundy. Bleaching, papery patches or steadily smaller leaves are clearer signs of a problem.

Metallic silver areas turn flat tan

A dry patch strongest on the exposed side is usually scorch. Restore bright filtered light and keep the healthy part of the leaf. Remove the blade if the tan area turns glassy, soft or continues to spread.

Broad leaves hang heavily

Some arching is normal as the leaves gain width. Sudden limpness across the clump calls for a root-ball check: rehydrate a light dry pot, or inspect a heavy wet one for soft roots and rhizome tissue.

New multicoloured leaves emerge scarred

Thrips can leave irregular pale rasping and black specks that interrupt the green, silver and burgundy pattern. Broad mites produce tighter, harder distortion. Inspect the folded growth and treat only the pest that is actually present.

Can cats or dogs chew ‘Macarena’?

‘Macarena’, including its broad blades, contains soluble calcium oxalates and is toxic to cats and dogs. A pet that chews the leaves or a stem may drool or vomit; exposed roots create the highest risk during repotting. Division can leave small rhizome and root fragments on the work surface. Count and discard every rhizome and root piece before pets return to the area. Keep pets outside the work area until the divided plant, used substrate and tools have been cleared. If drooling, vomiting or swallowing follows contact with the leaves or a stem, contact a veterinarian. Bag discarded roots, spent substrate and cuttings after repotting, then wash hands.

The many associations of ‘Macarena’

Macarena is a Spanish given name and a place name associated with Seville; it also became famous through a song and dance. The cultivar name does not establish which association its breeder intended.

It belongs to the Rex Cultorum Group, whose cultivated ancestry centres on Begonia rex but includes several other foliage species.