The ideal fertiliser for all rhododendrons and azaleas in your garden or containers. It contains a high potash content which increases flower bud formation and improves the size of your blooms. This plant food is organic-based and its slow-release formula works for up to 3 months. Guarantees longer preservation of blooms after cutting and contains extra Magnesium for brighter colours. Rhododendron & Azalea food fertiliser increases (due to the high organic content in the product) the humus content in the soil and improves soil structure and micro-life. Can be applied to soils with a high calcium content where it will lower the pH. 4kg.