In the face of soil degradation and current climatic variability, new adaptation practices such as the use of organic residues as biofertilisers are needed. Thus, two composts based on water hyacinths and pollen hulls, enriched with layer droppings for the first and ox dung for the second, were produced for 6 months. The study aimed to evaluate the effect of the composts on the growth and mass of tomato fruits. Their effects on fruit growth and mass were evaluated in a three-block randomised Fisher design. Composting was monitored by determining temperature, pH and moisture content. During composting, compost 1 had a maximum temperature of 52°C and compost 2 had a maximum temperature of 45°C. At the end of the composting process, the C/N ratios of compost 1 and 2 were 10.73 and 12.18 respectively, with pH values of 6.94 and 7.23. The N, P, K contents of compost 1 were 32.47, 20.1 and 25.2 g/kg/MS respectively, higher than those of compost 2, with 14.6, 3.72 and 13.14 g/kg/MS respectively. Also, the plants in the compost 1 treatments had better growth and produced fruits with a higher unit mass (52.39 g). Thus, the compost based on water hyacinths and pollen shells, enriched with layer droppings, could be used as an alternative to mineral fertilisers.