A water supply device put on the soil or buried in the soil in which the plants are planted. The water supply device includes a first part, a second part and a pipe. The first part is an annular part with a notch. The first part has a water storage space for storing water therein. The second part is located within the notch of the first part and has a room for storing fertilizer therein. The pipe is arranged along the first part and connected between the water storage space and the room. The pipe has a plurality of apertures distributed over the wall thereof. By using principles of differential-pressure and siphon, the water and fertilizer automatically move and are supplied to the plants so as to save time, expenses and efforts.本創作係為一種植栽用之供水容器，係可放置於植栽區域之土壤上或埋設於土壤裡面，其包含有一第一本體、一第二本體及一管路，其中，第一本體呈環狀並形成有一缺口，且包含有用來儲放植栽用水之儲水空間；第二本體對應前述缺口，且包含有可供放置肥料之一容室；管路係沿第一本體環設，並藉由管路讓儲水空間與容室相通，前述管路之管壁具有複數個微孔且分佈於管路上。藉由壓力原理及虹吸現象讓水自動的產生位移，而可長時間提供水分及適當的養分給植栽物，使得植栽物健康生長，以達到省錢、省時、省力及節能環保的訴求。
