Acceleration of Flowering in Non-vernalized Chrysanthemums by the Removal of Apical Sections of the Stem

Abstract

IT has been shown that plants of Chrysanthemum morifolium ‘Sunbeam’ (incorrectly termed ‘Indian Summer’), raised from basal cuttings taken from parent plants grown and flowered at high temperatures, require a period of low temperature or vernalization in order that normal stem elongation and rapid flowering may occur. Without such a period of low temperature these plants grown in high temperature conditions (> 60° F.) fail to elongate normally and are considerably delayed in flowering1.