Natural Plant Feed 50L x 4 Bags - Save 10%4 x 50 litre bags Save 10% with 4 bags of our organic slow release plant food that can be mixed into soil or compost or used on the surface as a top dressing. Rich in nutrients and trace elements, its broken down gradually by organisms in the soil as a long term, slow release fertiliser. Excellent at retaining water when used as a mulch on the surface or when dug in to the soil or compost, which reduces your watering requirements through the dry