Response of Zinnia Cultivars to Different Levels of Humic Acid

Z innia (Zinnia elegans) belongs to the family Asteraceae.It is a summer annual cut flower and getting popular due to its several colorful blooms.It is originated from Central America and Mexico."Blue Point" and "Oklahoma" are the most grown zinnia cultivars are considered the colorfully blooms and better performance (Dole, 1999).Zinnia is annual and perennial plants and its flowers display uniform colors, bright, strong stems with long vase life and disease resistant plants.Zinnia is the most familiar species and a plant of hot and warm climate.Conventionally, taller cultivars of Zinnia are used in beds and borders, for cut flowers but the dwarf cultivars in window planters, and containers ( Jana and Pal, 1991).Zinnia is propagated through seeds and seeds are directly sown in pots, and then transplanted in to field.Zinnia required 23-27 o C for germination in five to seven days.When seedlings at