the effect of cycocel and pot size on vegetative growth and flowering of zinnia (zinnia elegans)

Zinnia is a very attractive and beautiful ornamental plant due to thediversity of color and flowering period. the effect of cycocel and pot sizewas studied on growth and flowering of zinnia in a factorial experimentbased on a randomized complete design with two factors: cycocel at 3levels (0, 1000 and 2000 ppm) and pot size at 4 levels (10, 12, 14 and 16cm) with 12 treatments and 3 replications. the interaction results showedthat cycocel and pot size had a significant effect on all studied traits, that2000 ppm cycocel in 12 cm pots produced the minimum height and that 16cm pots treated with 1000 ppm cycocel or without cycocel treatmentproduced the maximum plant height. maximum flowering period wasrelated to 14 cm pots × 1000 ppm cycocel that had no significant differencewith plants in 16 cm pot size in all three concentrations of cycocel.minimum flowering period was related to 10 cm pot size at all three concentrationsof cycocel. zinnias planted in 10 cm pot size without cycoceltreatment exhibited the minimum fresh weight and in 14 cm pot sizewithout cycocel treatment exhibited the maximum root fresh weight.overall, flowers in 14 and 16 cm pot sizes treated with 1000 ppm cycocelwere found to be the best treatments.