A plant culture apparatus includes: a culture container including a transparent surrounding wall, a top opening, and a cover to close the top opening; a liquid culture medium disposed inside the culture container and having a liquid surface distal from the cover; a plant support fixed inside the culture container; a plant supported by the plant support; and a solid culture medium disposed within the culture container above the liquid surface. The solid culture medium is dissolvable in the liquid culture medium when the liquid culture medium is caused to contact the solid culture medium.