Effects of growing medium on shoot dry weight (SM), shoot height (SH), crown width (CW), number of leaves (NL), root: shoot ratio (R∶S), peduncle length (PL), flower size (FS), and flower number per plant (NF) at the end of the experiment.

aComposted corn cobs (C), pyrolysed corn cobs (PC), pyrolysed garden wastes (PG), and Pindstrup sphagnum peat moss (P); PC (100%), C (100%), PG (100%), C (70%) + PG (30%), PC (70%) + PG(30%), P (50%) + C (35%) + PG (15%), P (50%) + PC (50%), P (50%) + PC (35%) + PG (15%), and P (50%) + C (50%).bWithin a column, means followed by different letters are significantly different according to Duncan's multiple range test at P*P**P