To propagate Golden Club (Orontium aquaticum), the most common method is division of its rhizomes in early spring; you can also propagate it by sowing seeds as soon as they are ripe, ideally in very shallow water or moist soil in a warm, bright location. 

Key points about propagating Golden Club:

Division: Best time: Early spring 

Process: Carefully separate the rhizomes from the existing plant and plant them individually in new locations. 

Seed propagation:Collect seeds: Gather seeds when they are mature, usually in late summer. 

Planting: Sow seeds directly in shallow water or moist soil.  Germination: Keep the soil moist and in a warm environment until germination occurs. 

Important considerations:

Growing conditions: Golden Club thrives in shallow water with muddy soil and full sun. 

Planting location: Plant divisions or seedlings in a pond or wetland garden where they can access adequate water depth. 

Removal of flower spikes: It’s recommended to remove the short-lived flower spikes once they fade.