The World Checklist of Selected Plant Families recognises 5 species. Holarrhena is native to tropical and southern Africa as well as south, east, and southeast Asia.
Water:
Holarrhena adapts well to arid regions, thriving on minimal moisture and exhibiting drought tolerance. It requires infrequent watering, about once every 2-3 weeks. Overwatering can harm holarrhena, which benefits from natural rain patterns in its native climate, aligning with its low water needs.
Propagation:
The primary propagation method for holarrhena is seed sowing, also using cuttings. Key factors include warmth, light, and well-draining soil. Pre-treat seeds to enhance germination. For seed propagation, scarify and sow in a mix, maintain 20-25°C. For cuttings, use semi-hardwood and keep humid.
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