This book entitled "Effect of bio-fertilizers and nutrients on African Marigold (Tagetes erecta)." written by author on the basis of his research work, practical expectance and information gathered from various reports, important review, research paper, journals and books. Application of bio-fertilizers and nutrients has left significant response on vegetative growth of marigold. Azotobacter + PSB + 75% NPK have resulted maximum plant height followed by Azotobacter + PSB + 50% NPK and number of branches and plant spread were found significant difference through bio-fertilizers and nutrient application in African marigold. Application of nutrients has resulted significant response on flowering attributes and yield of African marigold. Early flower bud initiation and opening first flower was found under Azotobacter + PSB + 75% NPK, duration of flowering was also recorded under this treatment. Truthful analysis and critical estimate will be the real records of this mammoth work.