Plant & Soil Additives Show filters Hide filters Filter products Clear selection (Size) 2.5L (1) 5L (1) 10L (1) 20L (2) 100L (2) Clear selection (Form) Medium (1) Clear selection (Spec. 1) 1kg (1) 3.5kg (1) 2.5kg (1) 10kg (3) 4kg (1) 200g (1) 360g (2) 500g (1) Clear selection (Spec. 2) 25kg (1) Clear selection (Brand) Empathy (4) Thomas Elliott (1) Vitax (8) Westland (1) Clear selection £ - Clear selection A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Clear selection 1 - 1 of 1 productsItems per page1530456075AllSort byName ascendingName descendingPrice ascendingPrice descendingOffersPopularity Choose display: Hydrangea ColourantCan be used to change pink hydrangeas to blue. Pale pink varieties are the best to change. Contains iron sulphate. Causes...9 units in stock £ 7.00More info 500g