Light plant nutrient block for greening roof surface

The utility model mainly relates to the technical field of ecological environment protection, in particular to a lightweight plant nutrition block which is used for roof surface verdurization. The lightweight plant nutrition block is characterized in that the plant nutrition block comprises a water proof layer (1), a first protective layer (2-1) is arranged on the water proof layer (1), a nutrition layer (3) is arranged on the upper portion of the first protective layer (2-1), and a second protective layer (2-2) is arranged on the upper portion of the nutrition layer (3). The shape of the upper surface of the plant nutrition block includes polygon, circular shape or elliptical shape. The lightweight plant nutrition block is light in weight, low in density, is low in pressure for the existing buildings when the plant nutrition block is laid on the roof, and is small in influence of adding the weight of the load of the roof, doesn't change the structure of the buildings when in construction, is low in price of used raw materials, low in verdurization cost, nontoxic and harmless in used raw materials, meets environment protection requirements, can not pollute the environment, and is convenient and fast in construction.