Marigold is ideal for cultivation as pot plant for garden display and as a bedding plant. It has important role in preparation of garlands, bouquets and for floral decoration at the time of marriages and other ceremonies. It has also gained industrial importance due to its huge potential in value addition. Hence, to fulfil the demand of traders, consumers and industrialists, it is necessary to increase its production. The increase productivity of flower crop can appreciably be achieved through adoption of improved agro-techniques. This book “African Marigold- Role of Plant Growth Regulators” is an attempt to examine the effect of Gibberellic acid and NAA on growth and yield, to determine the suitable concentration and their number of foliar sprays to obtain maximum growth and yield of African marigold.