In the study we wanted to determine whether the growth of the cuttings is influenced by the source material and the sugar content in the cuttings. In the experiment we used four varieties of Pelargonium: 'Calliope L Dark Red' and 'Tango Dark Red' (portrait varieties) and 'Acapulco Cascade' and 'Ville de Paris Rot' (hanging varieties). The experiment was conducted in 2017 on the dates, the 45th, 47th and 48th consecutive weeks in the year. The cuttings were brought to Picount company from Kenya and Ethiopia on 8 November, 22 November and 29 November. On the same days the fresh weight and total soluble solids of the plant material were measured in the laboratory of the Biotehnical Faculty in Ljubljana and divided into plant parts (leaves, stem, tip). Then we determined the sugar content. In the upright varieties the average sugar content was reduced under the sampling data, in the drifing varieties the sugar content was higher in the 48th week. Two weeks after the placing into plug trays we evaluated the rooting of the cuttings and found that the 'Acapulco Cascade', was the best rooted (72%) and the worst 'Calliope L Dark Red' (45%). Thirty days after placing the cuttings in cuttings trays, we evaluated root development. With grades 3 and 4, the best rooting has got varieties 'Tango Dark Red' and 'Ville de Paris Rot' (95%). The hanging variety 'Acapulco Cascade' was best rooted as it also had the highest sugar content, which tells us that the sugar content is key to better root development.
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