Tui Performance Naturals Tomato & Vegetable Liquid Fertiliser is formulated using NatureN, a fast-acting natural ingredient that is super rich in nutrients. Use throughout your garden, and in pots and containers, to get your tomatoes and veges growing happy and healthy. Apply every two weeks during the key growth periods of spring, summer, and autumn. Do not use if temperatures are expected to exceed 30 degrees Celsius. May contain minor non-natural impurities due to manufacturing process.