Absorbent sponge generally refers to flower arrangement mud. Flower arrangement mud is a kind of flower arrangement product made of phenolic plastic foam. Like flower arrangement, it is a special appliance for fixing and supporting flower materials. Shaped like a rectangular brick, it is as light as foam and as heavy as lead after absorbing water. It is essential to insert a flower basket and use a wide-mouthed shallow flower device. Foam flower arrangement mud used for flower preservation is a kind of open-cell foam plastic, which can absorb a lot of water in a short time. Arranging flowers on water-filled foam can not only fix flowers, but also prolong their preservation time, so flower arrangement mud is widely used for the decoration of flower baskets. In addition, the use of flower arrangement mud also facilitates the long-distance transportation of flowers. Flowers will wither easily if they are not replenished with water and nutrients in time during transportation and preservation after being cut. Inserting them into water with preservative can prolong their life by 3-5 days, but the fluidity of water makes it difficult to keep the shape of flower arrangement and achieve perfect artistic conception. Inserting flowers into water-filled flower arrangement mud can not only prolong the life of flowers by one week to half a month, but also fix them; Maintain the beautiful plastic arts of flower arrangement, so that the short artistic life of flowers can be continued and sublimated.