PROBLEM TO BE SOLVED: To provide a hydroponic apparatus capable of continuously performing dormancy breaking of a plant and cultivation of the plant.SOLUTION: A hydroponic apparatus 100 comprises: a ground surface part 12 that partitions an underground space 11a which has a through-hole 12a into which a plant 10 is inserted and where an underground part 10b of the plant 10 grows, and an aboveground space 1121 where an aboveground part 10d of the plant 10 grows； a cultivation vessel 11 which forms the underground space 11a so as to include the underground part 10b together with the ground surface part 12； germination promotor supply parts 1000, 2000 which supply a germination promotor 3 stored in a germination promotor storage part 30 to at least either one of the aboveground parts 10d, 20d and the underground parts 10b, 20b； and a control part 40 which controls a mode in which the germination promotor supply parts 1000, 2000 supply the germination promotor 3 to the plants 10, 20.SELECTED DRAWING: Figure 1【課題】植物の休眠打破とその植物の栽培とを継続して行うことができる水耕栽培装置を提供する。【解決手段】水耕栽培装置１００は、植物１０が挿入される貫通孔１２ａを有し、植物１０の地下部１０ｂが成長する地下空間１１ａと植物１０の地上部１０ｄが成長する地上空間１１２１とを仕切る地表面部１２と、地表面部１２とともに地下部１０ｂを内包するように地下空間１１ａを形成する栽培槽１１と、地上部１０ｄ，２０ｄおよび地下部１０ｂ，２０ｂの少なくともいずれか一方へ萌芽促進剤貯留部３０に貯留されている萌芽促進剤３を供給する萌芽促進剤供給部１０００，２０００と、萌芽促進剤供給部１０００，２０００が植物１０，２０へ萌芽促進剤３を供給する態様を制御する制御部４０と、を備えている。【選択図】図１
