Modern plant baskets often do not require hessian due to their smaller mesh sides however many customers like to add an extra layer of protection. A double layer may also be used to enclose root balls if plastic pots are not to be added to the pond.
A square of hessian fabric, approximately 45cm x 45cm (18 inches x 18 inches). For lining open-mesh aquatic baskets (crates) or enclosing root balls.
One hessian square will line two baskets of around 3-litre capacity if cut into appropriately-sized pieces. But if you do not want to bother cutting it up, use one hessian square per basket.