The invention discloses a biomass organic fertilizer for ornamental nursery stocks. The biomass organic fertilizer is prepared from, by weight, 13-14 parts of furfural residues, 6-7 parts of zeolite powder, 1-2 parts of manganese sulfate, 1-2 parts of zinc chloride, 8-10 parts of eggshells, 28-30 parts of tea seed cakes, 5-7 parts of ammonium nitrate, 95-105 parts of crop straw, 3-5 parts of oligochitosan, 2-3 parts of silica micropowder, 7-8 parts of shell powder, 64-68 parts of waterweed, 2-3 parts of a cellulase preparation, 2-3 parts of a protease preparation, 10-14 parts of tamarindus fruits and a proper amount of water. According to the biomass organic fertilizer, zeolite powder, shell powder and the like are added based on the characteristics of nursery stocks, so that the permeability of soil is effectively improved, nutrients are uniformly released, and it is guaranteed that grassland with growing grass is flat; by adding oligochitosan, silica micropowder and the like, the tenacity of fiber in nursery stock bodies can be improved, the elasticity of grassland can be improved, the grassland can restore rapidly after being treaded or pressed heavily, and the attractiveness of nursery stocks can be guaranteed. The biomass organic fertilizer is suitable for nursery stock greening land.