The present investigation Efficacy of plant growth retardants on growth, flowering, yield and shelf life dahlia (Dahlia variabilis L.) cv. Shubhra was conducted in Research Field, Department Horticulture, Sam Higginbottom University Agriculture, Technology Sciences, Prayagraj, during winter season (2022-23). experiment laid out Randomized block design (RBD). There are 9th treatment combination ...