Fuente: WIPO "tomato" Described herein is a swellable composite for enhancing seed germination, comprising cellulose nanofibres (CNFs) and/or cellulose microfibres (CMFs), a water soluble polysaccharide, and optionally an active agent, as well as a precursor composition for same further comprising water, a method for making same, and a method of enhancing seed viability, seed germination, root development and/or plant growth using same.