Production of Pot-mum Using Cuttings Differentiating Flower Buds

Abstract

Cuttings differentiaing flower buds were rooted and grown in six cm pots under short-day conditions to reduce the size of pot-mum and save labor.
The optimal time for cutting was about two weeks after the start of short-day treatment when the flower buds developed to the stage of floret formation. The period of cultivation and the height of spray and standard-type pot-mum were extremely reduced using cuttings differentiating flower buds compared with the ordinary culture method of pot-mum in which vegetative cuttings were rooted under long-day condition. This new culture method decreased the number of flowers on spray-type chrysanthemums (Dendranthema grandiflorum). However, it had little influence on the number of flowers on some interspecific hybrids between D. grandiflorum and D. pacificum.