Table 1.
Growing media in experiment

Growing media	Composition
PM	90% Peat moss + 10% perlite (commercial substrate)
PS	30% Peat moss + 10% perlite + 60% pine sawdust
PSS10	30% Peat moss + 10% perlite + 60% steam treated pine sawdust (10 min)
PSS20	30% Peat moss + 10% perlite + 60% steam treated pine sawdust (20 min)
PSS30	30% Peat moss + 10% perlite + 60% steam treated pine sawdust (30 min)
OS	30% Peat moss + 10% perlite + 60% oak sawdust
OSS10	30% Peat moss + 10% perlite + 60% steam treated oak sawdust (10 min)
OSS20	30% Peat moss + 10% perlite + 60% steam treated oak sawdust (20 min)
OSS30	30% Peat moss + 10% perlite + 60% steam treated oak sawdust (30 min)

Steam treated: Steam treatment temperature is 120°C.