Searles Flourish® Orchid Booster is a soluble plant food suitable to apply to orchids by using a watering can, hose applicator or fertiliser injector. For fast results, apply fertiliser solution to foliage just as you would when watering normally. Searles Flourish® Orchid Booster contains chelated iron, copper, zinc and manganese. Chelated micronutrients are fast acting and are absorbed rapidly through both leaves and roots.