In this work, plants of different Sedum species/varieties (Sedum L.) were monitored and measured. The measurements were carried out from 21. 03. 2022 to 20. 09. 2022, every other week, at the laboratory field of the Faculty of Biotechnology in Ljubljana. The plants included in the experiment were the basic species of white sedum (Sedum album) and the cultivars Sedum album 'Coral Carpet', Sedum telephium 'Herbstfreude' and Sedum spurium 'Variegatum'. We observed the growth of the shoots and the development of the inflorescences, the spread of the plants (length and width) and the plant height. We used the following tools: a tape measure, a spade and a beak scale. We counted the inflorescences of the plants once during the growing season. In Sedum telephium 'Herbstfreude', the number of inflorescences per plant was very high. Therefore, all three plants of this variety were divided into four equal parts and the inflorescences on one quarter of each plant were counted. The number of inflorescences on the whole plant was then estimated by multiplying the value for the number of inflorescences on each quarter by four. For this variety, the length and diameter of each inflorescence was also measured. For this purpose, 10 inflorescences per plant were selected and these measurements were taken on these plants. For each plant, two measurements were taken with a 90° shift. Finally, we calculated the average of the inflorescences for each individual plant of Sedum telephium 'Herbstfreude' separately. For each species and cultivar, the standard deviation was calculated to determine the variability of the measurement results. The variability was highest for Sedum spurium 'Variegatum'. The plants of Sedum telephium 'Herbstfreude' developed the most inflorescences in the 2022 growing season and the shape of the inflorescences was ellipsoid. The plants of Sedum spurium 'Variegatum' did not flower at all. The measurements showed great diversity among species and cultivars of the Sedum genus.
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