A 40 day experiment was carried out on the biodegradation of water hyacinth (WH) into value added ruminant feed using two white rot fungi (Pleurotus florida (PF) and Pleurotus sajor caju (PS)) in a Solid State Fermentation. Results revealed that crude protein (CP) increased significantly (p<0.05) from 11.65% in untreated WH to12.86% and 14.38% in WH treated with PF and PS respectively. This pattern was also observed for ether extract and ash. However, the Crude fibre (CF) decreased significantly (p<0.05) from 21.23% in untreated WH to 18.23 and 15.25% in WH treated with PF and PS respectively. Same trend was observed for neutral detergent fibre (NDF) and acid detergent fibre (ADF), which decreased from 66.80 and 36.90% in untreated WH to 63.17 and 32.96, and 64.32% and 33.21% in WH treated with PF and PS respectively. Fungi treatment significantly enhanced Organic matter digestibility (OMD) and metabolizable energy (ME) compared with the untreated WH (p<0.05). In vitro gas production did not differ significantly between the treatment means for ‘a’ and ‘c’ fractions, while the ‘b’ and ‘a+b’ fractions ranged significantly (p<0.05) from 11.80 and 15.60 ml in untreated WH to 12.12 -13.00 and 15.85 – 16.73 ml in WH treated with PF and PS for ‘b’ and ‘a+b’ fractions respectively. Methane production decreased significantly from 4.00ml/200mg DM in untreated WH to 2.50 and 2.00 ml/200mg DM in WH treated with PF and PS respectively. This study revealed that fungi treatment of WH enhanced chemical composition and in vitro degradability. This improvement will enhance the value of WH, in endemic areas, for sustained ruminant production, especially during the off season.