Sulphur powder, also known as agricultural sulphur is an excellent acidifying agent for lowering pH of alkaline soils. This is very important for plants that require acidic conditions such as azaleas, camellias, gardenias, rhododendrons, ericas, hydrangeas, philodendrons & other acid loving plants. Deficiencies of Sulphur result in restricted growth and yellow leaves. - Available sizes: 500g