The invention relates to a cultivation medium dedicated for roof afforestation, container plant cultivation, especially relating to compression type plant cultivation medium suitable for ground cover plant, perennial plant, undershrub etc. The inventive medium is composed of fertilizer, binding agent, plant growth regulator. The fertilizer comprises wooden nutrient, organic fertilizer, composite bacteria strain, the said binding agent is attapulgite soil, while plant growth regulator is rare earth additive. The inventive medium is optimum for nutrient collocation, light-weighted, washout-resistant, water-preservative, drought-resistant, air-permeable which can be widely used in court afforestation, especially for roof afforestation.