Begonia ‘Black Fang’

A cultivated member of the rhizomatous group

Begonia ‘Black Fang’ is a horticultural selection belonging to the rhizomatous Begonias.

Rhizomatous Begonias occur naturally in several tropical regions. Many grow close to the ground in humid, sheltered forest sites, while climate and root substrate depend on the species.

Leaf and rhizome care for foliage plants

Support, pruning, handling and leaf care

Do not stake the petioles of Begonia ‘Black Fang’. Guide its surface rhizome across the mix so new leaves have room to form, and divide only a rooted section with a live bud.

Light

Give Begonia ‘Black Fang’ a position close to an east or north-east window, or close to a south or west window behind a light curtain. Acclimate it gradually, since sudden intense exposure means the upper leaf surface bleaches or scars and the rhizome dries unevenly.

Watering

Begonia ‘Black Fang’ is ready for water after the upper layer of the substrate has dried while the shallow root zone below remains faintly moist. Test beneath the active end of the rhizome on the plant.

Substrate and roots

The root structure of Begonia ‘Black Fang’ is a sideways-growing rhizome and a modest mat of delicate feeder roots. Keep the rhizome of the plant uncovered and give its growing end open surface space.

Repotting

Give Begonia ‘Black Fang’ a new pot when the rhizome reaches the rim, roots fill the shallow pot, water moves unevenly or the substrate has compacted. Set the plant so the growing rhizome has room to advance across the fresh mix.

When Begonia ‘Black Fang’ needs attention

Dark leaves look almost black

Very deep pigment is normal across a dry, firm leaf with the the plant’s usual markings. Rotate a doubtful leaf under strong indirect light. A translucent, papery or soft area spreading through the surrounding dark tissue is damage.

Jagged margins curl and turn brittle

The angular outline is part of the Begonia ‘Black Fang’, but its narrow points can dry after an unevenly dry root ball, salt build-up or moving hot air. Check the pot and placement first. A fresh tear cuts across the natural teeth; a dry established tooth is not chewing damage.

A dry split on a dark leaf

The stiff, sharply outlined blade can catch on a shelf or neighbouring plant. A stationary dry split is mechanical, so give new leaves room and keep the healthy leaf. Remove it if the injured line turns wet or begins to soften toward the leaf stalk.

Compact centre suddenly collapses

Dense black foliage can hide a failing growth point. Several petioles dropping together, an odour or soft tissue require immediate action. Cut back to firm, healthy tissue immediately. Use an unaffected leaf or outer stem piece for propagation.

Begonia ‘Black Fang’ is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• The roots and rhizomes contain the highest levels of soluble oxalates, and the sap can irritate skin.
• Chewing may cause mouth irritation, drooling, vomiting or stomach pain. Contact a veterinarian or medical professional if symptoms develop.

How the name Begonia came about

Begonia honours Michel Bégon.

Carl Linnaeus established the genus Begonia in 1753 in Species Plantarum, page 1056.