EFFECTS OF PLANTING DEPTH AND COLD TREATMENT ON GROWTH AND FLOWERING OF LILIUM HYBRID
The days from potting to shoot emergence and flowering were shortened when the duration of cold treatment was extended. When one-half of the bulb was exposed above the growing medium, stem elongation was accelerated. However, the final plant height at flowering time was not influenced by planting depth of the bulbs. The number of flowers was increased as the cold treatment period was increased in all L. x elegans cultivars except 'Pojitano'. The number of leaves was either reduced in 'Connecticut King' and 'Pojitano' or increased in 'Enchantment' and 'Roma' as bulb cold treatment period was extended. The number of leaves and flowers in 'Hinomoto' were not affected by the duration of cold treatment and planting depth. Activities of endogenous inhibitor in the inner and outer scales were decreased when the bulbs were exposed to light.
Choi, S., Cheong, S. and Ahn, H. (1996). EFFECTS OF PLANTING DEPTH AND COLD TREATMENT ON GROWTH AND FLOWERING OF LILIUM HYBRID. Acta Hortic. 414, 235-242