Folia Horticulturae

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Effect of the planting date on the quality of pot chrysanthemums from the Time group in all-year-round culture

Włodzimierz Bre¶*, Marek Jerzy**

**Department of Horticultural Plant Nutrition
**Faculty of Horticulture, Agricultural University in Poznań
**Zgorzelecka 4, 60-198 Poznań, Poland
**Department of Ornamental Plants
**Faculty of Horticulture, Agricultural University in Poznań
**D±browskiego 159, 60-594 Poznań, Poland
**e-mail: ozdobne4@au.poznan.pl

The quality of the flowering plants of four chrysanthemum cultivars was studied in 12 growth cycles starting on the second day of each month throughout the year, from January to December. No supplementary light was used. The plants which attained the highest quality were those potted between February and September and flowering between April and November, respectively, when real insolation amounted to 200-250 hours per month. In the autumn-winter season when the amount of insolation fell by half, the quality of flowering plants declined dramatically. Hence, planting dates between October and January were judged unfit for the start of controlled cultivation of pot cultivars of chrysanthemums.

Bre¶ W., Jerzy M., 2004. Effect of the planting date on the quality of pot chrysanthemums from the Time group in all-year-round culture. Folia Horticulturae 16/2: 119-126.