This research draft is based on intensive research work of two years on African Marigold. This will serve as ready reckoner for all the students, researchers and teacher on Plant Growth Regulators and their beneficial use on yield and quality traits of African Marigold. This book also encompasses the varietal evaluation of Marigold under the influence of PGRs levels. The important vegetative growth characters were significantly influenced by different plant growth regulators and variety treatments tried under this investigation.