Bamboo is considered to be an important biopolymer with useful applications in various fields including textiles. It is a renewable natural resource of cellulosic nature and it originates from grass family. It gives maximum biomass per unit area and time. In general, cellulosic fibres do not have acid dyeability as those of polyamide fibres. Hence, it is difficult to dye such fibres, unless modified, with acid dyes which are relatively cheaper than the direct class of dyes. In the current study, the bamboo rayon fabric was grafted with acrylamide using potassium persulphate (KPS) as an initiator. The grafting conditions were optimized in terms of temperature, time, initiator and monomer concentrations. The grafted product was characterized using FTIR, TGA, SEM and analyzed for textile properties like moisture regain and yellowness index. The ungrafted and grafted fabrics were dyed using acid dyes and tested for colour strength and fastness properties. An increase in the dyeability of the order of 150–230% was observed on grafting of bamboo rayon. The distinct improvement in moisture regain of the grafted fabrics was also observed, which is due to increase in the polarity of the fibres. Hence, better comfort can be expected out of such fabrics during summer. The bamboo rayon which is otherwise not dyeable with acid dyes, can be rendered acid dyeable by grafting technique.