Tomato Feed Concentrate For strong & healthy growth With added seaweed and magnesium Makes up to 300 litres Promotes top quality, full flavoured tomatoes Also feeds courgettes, aubergines and all flowering plants Doff Tomato Feed Concentrate is a top-quality liquid tomato food with seaweed & magnesium (0.012%Mg) to encourage strong, healthy growth and promote high yields of top-quality full-flavour tomatoes. It is ideal for the feeding of courgettes, aubergines and all flowering plants. This 1 litre bottle will make up to 300 litres of premium tomato feed.