Canola is the major cash crop in the Parkland zone, where many soils are deficient in plant-available S for high seed yields. Canola has high requirements for S. Deficiency of S at any growth stage can cause drastic reduction in seed yield. Plants feed only on sulphate-S (SO4-S). Traditionally, S supplied in fertilizers was usually present in the sulphate form (which is readily available to plants). Now, there are a wide variety of commercial fertilizers that contain S in an unoxidized or elemental form. These elemental S fertilizers cost less per unit of S than the sulphate-S fertilizers, but the effectiveness of these fertilizers depends on how quickly the S is oxidized in soil for effective plant uptake. The objective of this study was to determine the relative effectiveness of elemental S and sulphate-S fertilizers on yield and quality of canola seed.