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Full Specimen Plate
Begonia dregei
Dwarf Grape Begonia
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Begonia dregei Price Guide & Auction Value
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Before You Buy
Species-specific things to check when evaluating a listing
- Check for powdery mildew — a white dusty coating on leaf surfaces, especially in dry conditions; it spreads rapidly between plants
- Inspect for mealybugs at leaf axils and the underside of stems where they hide in white cottony deposits
- Rhizome begonias should show firm, healthy rhizome tissue — avoid plants with soft, discoloured rhizomes
- Most begonias ship well as leaf cuttings — if buying a cutting, ensure it has a healthy petiole and no signs of rot at the cut end
Begonia dregei Morphology
About Begonia dregei
Begonia dregei, described by Otto and Dietrich, is a caudiform species endemic to rocky slopes and forest margins of eastern South Africa — occurring in seasonally moist habitats with bright filtered light and well-drained, humus-rich substrate among leaf litter and stones. It is the only commonly cultivated South African Begonia to develop a pronounced caudex: a swollen, thickened tuberous base that enlarges gradually over years, eventually producing the bonsai-like appearance that has made this species a favourite among succulent and caudex collectors as well as dedicated begonia enthusiasts. From the caudex, slender reddish stems produce a naturally shrubby, multibranched habit carrying small, asymmetrical, rounded to ovate leaves with crenate margins. South African in origin but Japanese in the aesthetic it suggests, dregei appeals well beyond the conventional begonia collector.
Native Range
South Africa
Propagation Guide
How to Propagate Begonia dregei
3-5 months
Cultivar character is preserved through vegetative cuttings
Most rhizomatous begonias root readily from leaf sections or petiole cuttings placed on moist substrate. Keep warm and humid until plantlets emerge at leaf margins.
Care Guide
Begonia dregei Care Guide & Growing Conditions
Light, well-draining mix: 50% perlite, 30% potting compost, 20% orchid bark. Begonias are susceptible to root rot — excellent drainage is essential.
Allow the top half of the substrate to dry between waterings. Water at the base — wet leaves invite fungal problems. Reduce in winter.
50–70%. More tolerant of average indoor humidity than tropical aroids, but consistent moisture prevents crispy leaf margins.
Balanced liquid fertiliser at quarter strength every 2–3 weeks during the growing season. Do not feed in winter.
Every 12–18 months in spring. Begonias like shallow, wide pots that suit rhizomatous growth. Don't bury the rhizome.
Common Problems
Powdery mildew
Poor air circulation combined with high humidity
Improve airflow; avoid wetting leaves; treat with a dilute bicarbonate of soda spray
Botrytis (grey mould)
Overwatering, dead leaves left on plant, poor air circulation
Remove dead foliage promptly; increase airflow; reduce watering
Leggy stems
Insufficient light
Move to a brighter position — begonias need good indirect light to maintain compact growth
The South African Anomaly
A South African begonia, which is immediately unusual provenance for a genus so strongly associated with tropical forest. Begonia dregei grows on rocky slopes and forest margins in the eastern half of South Africa, tolerating seasonal drought in a way that most of its relatives would not entertain for a moment. Produces small, neatly lobed leaves with dark veining on a compact, shrubby plant. Named for the Czech botanist Carl Friedrich Drège who collected extensively in 19th-century South Africa. Nothing to cause tremendous excitement, but genuinely useful for collectors who manage varied conditions across their growing space.
