Efficiency of Eisenia foetida, Amyanthes diffringens and Eudrillus eugineae in vermicomposting of plant biomass viz., rice straw, Ipomoea carnea, Eichhornia crassipes alone and in mixture was studied during summer and winter seasons. All the species were found efficient in vermicomposting of plant biomass. Time required for composting varied from 50-70 days and 55-75 days during summer and winter seasons, respectively. E. foetida was at par with E. eugineae as regards to their multiplication rate and composting period. The multiplication rate was lowest with A. diffringens which also took relatively longer time for composting. The compost recovery did not change with earthworm species. The highest compost recovery was obtained from Ipomoea biomass followed by mixture of rice straw, Ipomoea and Eichhornia biomass. The compost recovery was lowest with Eichhornia biomass. Irrespective of earthworm species, the population at maturity of the compost was increased by 8-12 times over the initial population. Earthworm activity substantially narrowed down the C : N ratio and increased the nutrient content in the compost over the initial value of the respective biomass. Different earthworm species could not show any significant variation in the nutrient content except for nitrogen and phosphorus, which were significantly higher with E. foetida and E. engineae compared to A. diffringens. Vermicompost prepared from Ipomoea biomass had the highest nutrient level followed by mixture use of rice straw, Ipomoea carnea and Eichhornia crassipes biomass. The lowest C : N ratio was recorded in the vermicompost from Ipomoea biomass, while the highest was recorded from rice straw.