Algoplus natural rose fertilizer is designed for all climbing rambling miniature and shrub roses it also helps to resists black spot our clients rave that they have never found a better product for their roses commerical rose growers use it too our rose fertilizer is a concentrated liquid fertilizer containing all of the necessary nutrients and magnesium to stimulate a generous flowering and healthy stems on the rose without harmful additives Specifications . Capacity 1 litre. Weight 3 lbs