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Three cultivars of chrysanthemums from the Time group were grown in the spring and summer-autumn seasons in 2003 - 2004. Three nutrient solutions with different nitrogen and potassium contents were applied. Samples of healthy, fully developed leaves were taken for chemical analyses when inflorescence buds appeared, and in the phase of full blooming. The concentration of total N, P, K, Ca and Mg in plant tissue was determined. The nutritional status of plants was very similar in spite of the fact that the plants were grown in different light conditions and different nutrient solutions were used. The paper also contains a proposal of more precise guide values for nitrogen (N 4.35-5.53% d.m.) and for potassium (K 6.36-7.97% d.m.).

Macroelement concentration in leaves of chrysanthemums from the Time group grown in spring and summer-autumn seasons