Vernalization in a greenhouse promotes and synchronizes flowering of Osteospermum ecklonis Norl
2001
Suzuki, A. | Metzger, J.D.
The effect of cool temperature treatments on flowering of Osteospermum ecklonis Norl. cv. Nairobi was evaluated. Plants vernalized at temperatures from 4 to 15 degrees C for 4 to 6 weeks exhibited increased flower numbers, more synchronized flower development among individual plants, and reduced forcing times. Part of the increased flower number observed in the vernalized plants could be attributed to a small increase in branch numbers from 2 to 3. However, a longer period of vernalization slowed flower development, and therefore increased overall production times. Vernalization also reduced stem growth, primarily through a reduction in the number of nodes produced by each branch.
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