Primary propagation of hopea is typically through seeds, as cuttings and division are less common due to the plant's growth characteristics. Key factors for seed propagation include ensuring a warm climate, high humidity, and well-draining soil, mimicking the plant's tropical habitat. Special techniques such as soaking seeds to enhance germination and providing shade can improve success rates. Propagating hopea is moderately difficult, mainly due to slow germination and seedling growth. Step-by-step propagation involves: collecting ripe seeds, soaking them for 24 hours, sowing in a seedbed with sandy loam soil, lightly covering with soil, maintaining consistent moisture, and providing partial shade until seedlings are established.