The best selling liquid concentrate plant food. Contains seaweed extract that supplies many micro-nutrients essential for maximum growth and better crops. Ideal for feeding growing bags, giant planters and tomatoes growing in the ground. NPK: 4-3-8 with magnesium. Available in 3 sizes: 500ml (makes 113 litres of feed); 1 litre (makes 225 litres) and 2.5 litres (makes 563 litres).