ISHS Acta Horticulturae 205: Symposium on the Development of New Floricultural Crops, XXII IHC
INFLUENCE OF PROPAGATION, FERTILIZATION LEVELS, AND LIGHT ON GROWTH OF PSEUDERANTHEMUM SPECIES |
| Authors: | Doris K. Rodriguez, Fred D. Rauch |
| Abstract:
Three new species of Pseuderanthemum which appear to have potential landscape value were selected from the Acanthus collection for further evaluation. One species, P. sinuatum also shows potential as a new flowering potted plant. All 3 species root readily from terminal cuttings in 3–4 wks. and treatments with commercial preparations of IBA did not enhance rooting. High light (30% shade) resulted in significantly greater dry weight production and flowering on all 3 species compared to those grown under 80% shade. Increasing the rate of Osmocote 18N:2.6P:10K (2, 4, and 8 kg/cubic meter) produced a corresponding increase in flowering of all 3 species at the higher light level. This was also true for growth of 2 species (P. sp and P. sinuatum) grown in high light, while P. laxiflorum produced best growth at the medium fertilizer rate. Fertilizer rate had no significant effect on growth at the 80% shade level for 2 species (P. laxiflorum and P. sinuatum) while P. s p resulted in optimum growth at the medium fertilizer level. Relatively high levels of the major nutrients were found in the most recently matured leaves after 3 to 4 months, suggesting that Pseuderanthemum is a heavy feeder. | |
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