Influence of temperature, media and concentration of ancymidol (α-cyclopropyl-α-[p-methoxyphenyl]-5-pyrimidine-methanol) on the growth and flowering of selected cultivars of Chrysanthemum morifolium were studied. As day/night temperature increased or decreased from 22/18°C length of time required for the plants to come into flower increased. Stem elongation and leaf area decreased while fresh weight increased as temperatures decreased from 30/26° to 18/14°. Ancymidol applied at a concentration of 0.25 mg/pot of aqueous drench was sufficient to control height of plants grown in most media except pine bark humus. Incorporation of river sand, greenhouse soil or Ca(OH)2 into pine bark humus increased ancymidol's effectiveness. Increasing growth regulator concentration also resulted in adequate height control for plants grown in pine bark humus.

Selected compounds applied to terminal, semi-hardwood cuttings of Fraser's photinia (Photinia x fraseri Dress) promoted rooting. Concentrated indole-3-butyric acid (IBA) solutions were more effective in promoting rooting than either commercially prepared talc or liquid formulations.

Southern waxmyrtle (Myrica cerifera L.) stem cuttings rooted in high percentages when taken in a transitional growth stage between a softwood and semi-hardwood condition and maintained under intermittent mist. Indolebutyric acid (IBA) treatments (1000 to 4000 ppm) had little effect on increasing percent rooting but greatly stimulated root number and length.

Comparison of stratified and nonstratified seed demonstrated that at 25° C (77° F), as duration of stratification increased from 0 to 60 days, germination percentage also increased. However, an opposite effect occurred for seed exposed to alternating temperatures of 30/20° C or 25/15° C (86/68° For 77/59° F). There were no significant differences observed in the final germination percentage between seed stratified for 30 days and nonstratified seed. Stratification hastened germination and decreased the light required for germination.

Plants of ‘May Shoesmith’ chrysanthemum (Chrysanthemum morifolium Ramat.) were grown in controlled environment chambers at optimal (16°C) and sup-optimal night temperatures. Reduced night temperatures were imposed for all or part of the night cycle. Number of days to flowering was delayed as night temperature decreased from 16° or as duration of reduced temperature during each diurnal cycle was increased. Compared to plants grown at a continuous 16° night temperature, plants grown at 10° for 9 or 10½ hours each night (with the remaining hours at 16°) had greater stem diameter, were taller and had flowers with greater diameter and fresh weight. Number of nodes was not affected.