A method for growing ornamental plants by hydroponic cultivation includes the steps of arranging a piece of a tree 2 in a water tank 1; fixing support members 3 to the tree; placing a plant 5 on the support members, the roots of the plants being embedded in soil 4, and supplying water so that the water level 61 becomes equal to or lower than the level of the support members, the support members 3 being permeable to water and free to deform.;An apparatus used for growing ornamental plants by hydroponic cultivation, utilises a piece of a tree 2 to be arranged in a water tank 1 and support members 3 to be fixed to the tree. The support members 3 are permeable to water and free to deform, thereby making it possible to realise the growing of plants 5 by hydroponic cultivation on the tree 2.
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