The invention provides a planting water supply device, which comprises a container and a plate body.The container comprises a bottom, a ring wall and a through hole, and the bottom of the container is connected with the ring wall.The through-hole of the container is arranged on the ring wall and adjacent to the bottom, and the through-hole has a top edge.The disc body comprises a bottom surface and a peripheral wall, the bottom surface of the disc body is connected with the peripheral wall, the bottom surface of the disc body is connected with the bottom of the container separably, and the height of the peripheral wall is not less than the distance from the top edge of the through hole to the bottom.The plant water supply device of the invention utilizes the siphon principle, so that the liquid in the container can flow out of the through hole of the container slowly with the pressure adjustment, so as to achieve the purpose of continuous water supply. It solves the problem that the potted automatic watering device of the prior art needs to use the power supply device, resulting in the waste of power supply and the increase of carbon dioxide emission in the environment.本創作提供一種植栽供水裝置，其包含一容器以及一盤體。容器包含底部、一環壁以及一通孔，容器之底部與環壁相連接。容器之通孔係設置於環壁且鄰近於底部，且通孔具有一頂緣。盤體包含一底面以及一周壁，盤體之底面與周壁相連接，盤體之底面與容器之底部係可分離地相連接，周壁之高度係不小於該通孔之頂緣至該底部之距離。本創作之植栽供水裝置利用虹吸原理，使容器內之液體可隨壓力調整且緩慢地從容器之通孔流出，達到持續供水之目的，解決現有技術之盆栽自動澆水裝置需使用電源裝置，造成電源浪費以及增加環境中二氧化碳之排放量之問題。
