Worm Castings vs Compost the Key Differences In terms of worm castings vs compost, both are natural forms of organic fertilizer that create nutrient-rich humus. Indeed, vermicompost is generally considered another form of compost. But what are the essential differences between worm castings and compost? Do worm castings make a better organic fertilizer than compost? https://gardeninglatest.com/worm-castings-vs-compost/