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Determining the Optimal Nitrogen and Phosphorus Rates for Sedum Growth


Conducted by: Youbin Zheng, Linping Wang, and Mary Jane Clark

Objective: To determine the optimal N and P rates for the growth of Sedum album var. murale and S. spurium 'Dragon's Blood' in order to formulate the right fertilizer type for Sedum plant production and maintenance.

Description: Different plant species have different fertilizer requirements, including fertilizer type (ratios among different elements, such as N and P), and application rate. When an inappropriate type of fertilizer is applied, it can cause either an under application of nutrients, resulting in plant nutrient deficiency, or over application of nutrients, which wastes fertilizer and eventually causes environmental damage. Currently, no data are available to guide companies in formulating fertilizer products with the right element ratios (e.g. N/P) for Sedum plant production and maintenance. To meet this need, we are conducting experiments using a hydroponic growing system to determine the optimal N and P rates, and ratios of N/P, for two Sedum species (S. album var. murale and S. spurium 'Dragon's Blood').

hydroponically grown sedum on a bench in a greenhouse
Hydroponic experiment growing Sedum album var. murale and S. spurium 'Dragon's Blood' in nutrient solutions with different N and P rates and N/P ratios at the University of Guelph





University of Guelph, Bovey Building, 50 Stone Road East, Guelph, ON, N1G 2W1