Made in United Kingdom. Solufeed is a fertilizer to prevent and correct iron deficiency for gardening in indoor home plants and outdoor gardens and grass as well as farms i.e. soils with high pH. Easy to use, directly add to soil. Product dissolves quickly once applied also effective in hydroponics and liquid feed systems. should be dissolved in clean water and sprayed onto the ground immediately before the final cultivation or between rows where crops are established.For deep rooted trees apply before growth recommences in the spring.