Dahlia foliar nutrient sufficiency ranges and growth response to fertilizer concentrations
Two dahlia (Dahlia × hybrida) cultivars were grown with one of five constant liquid fertilizer concentrations (75, 100, 200, 300, or 400 mg L‑1 N) using a 13N-0.86P-10.8K fertilizer. The cultivars used were 'Hypnotica Cherish Pink' and 'Goldalia Scarlet'. Tissue samples were collected and analyzed for foliar nutrient concentrations at two different times. At each harvest date, plant height, plant diameter, and shoot dry mass were recorded. Dahlias achieved maximum growth when grown with 100 to 300 mg L‑1 N, while 400 mg L‑1 N was detrimental. Foliar nutrient sufficiency ranges were determined based on fertilizer concentrations resulting in maximum growth. These results provide improved dahlia fertilization recommendations and foliar sufficiency ranges.
Henry, J.B., McCall, I., Cockson, P. and Whipker, B.E. (2020). Dahlia foliar nutrient sufficiency ranges and growth response to fertilizer concentrations. Acta Hortic. 1273, 243-250
fertilizers, floriculture, nutrition, tissue analysis