The present investigations were undertaken at experimental farm of department of Floriculture and Landscaping, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.) during the years 2012-2013. The China aster cv. ‘Kamini’ was selected for conducting the investigations. The experiment was laid out in RBD (Factorial) with 20 treatments and 3 replications. Tallest plant (83.32 cm) obtained with a combined application of 30 g N/m² and 25 g P₂O₅/m² (N₂P₃) that proved to be at par with N₂P₁, N₂P₂ and N₄P₃ whereas minimum plant height (46.42 cm) recorded in plants without nitrogen and phosphorus dose (N0P0). A combined dose of nitrogen and phosphorus significantly improved the plant spread. Maximum plant spread (76.00 cm) found in those plants with a combined dose of 30 g N/m² and 25 g P₂O₅/m² (N₂P₃) and proved to be significantly higher over all other treatments. Maximum number of branches per plant (7.01) recorded with 30 g N/m² (N₂) that proved superior over other treatments including control (N0). Largest leaf area (21.72 cm²) found with a combined application of 30 g N/m² and 25 g P₂O₅/m² (N2P3) and it proved to be at par with N₃P₁. However, minimum leaf area (9.82 cm²) recorded in plants supplied with 40 g N/m² and 25 g P₂O₅/m² (N₄P₃).

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