May, Jun, Jul
Use a mesh aquatic basket lined with hessian to stop the compost escaping. Part fill with aquatic soil.
Tease out the fleshy roots before placing the plant in the centre of the container, then firm the soil.
Mulch with large stones to keep the compost from floating off. Soak the basket in water.
Place the basket in the pond on a platform of bricks, gradually reducing its height over weeks.