The present investigation was conducted to study the effect of mulch, N and K application and their interaction on plant growth characters, yield and yield attributes of annual chrysanthemum (Chrysanthemum coronarium L) using three types of mulches (i.e. Crop residue mulch, Silver plastic mulch and Black plastic mulch) and four levels of nitrogen and potassium  i.e.  0 g N + 0 g K/m², 20 g N + 10 g K/m², 30 g N + 20 g K/m² and 40 g N + 30 g K/m² along with a uniform dose of phosphorus @ 20 g/m² & FYM @ 5 kg/m² except control. Black plastic mulch recorded maximum values w.r.t. plant height, plant spread, number of branches per plant, number of flowers per plant, flower diameter, number of seeds per flower head, seed yield per plant, seed yield per plot whereas in case of N and K application maximum values of these parameters were observed in case of the application of 40 g N+ 30 g K/m². The interaction effect of black plastic mulch × 40 g N+ 30 g K/m² recorded maximum values in terms of various growth, flowering and seed quality parameters of commercial importance.

 Key words: Plant growth, Yield, Chrysanthemum, Chrysanthemum coronarium L., Seed Quality, N and K Application