Nitrosol Organic Liquid Plant Food Concentrate Makes 125L Amgrow 500ml Nitrosol is the ideal fertiliser for all garden and indoor plants. Nitrosol has been a favorite of Australian gardeners for over 40 years. Its unique formulation provides the benefits of blood and bone and natural growth stimulants in a easy to use liquid form. Nitrosol provides an effective balance of major on minor nutrients and minerals that can be absorbed through both the plants leaves and roots. Nitrosol enhances soil fertility by encouraging beneficial soil microorganisms. Suitable for all indoor and outdoor plants. HOW TO USE: Nitrosol is highly concentrated. Add 40mL to a watering can (9-10 litres of water) and stir well. For best results apply to the foliage as well as the soil. Repeat every two weeks during the growing season. See label for details.