A plant growing kit, primarily for growing climbing plants such as tomatoes, is contained in a flat box approximately the shape of a pizza box. In preferred embodiments three legs are included, broken down into sections in the box and directable into a sturdy tripod, over which a flexible vine-attachment element, such as a wire or thin tubular member or plastic coil, is assembled preferably in a tapered helical configuration. Also in the box is a basket, in flattened condition but erectable into a deep configuration and with provision for attachment to the legs, near their bottom ends, the basket being configured to contain a bag of soil, which may remain in the bag. The consumer provides drainage holes in the bag and an opening at top for the plants to grow and to climb up on the tripod and vine-attachment element. With a water-catching saucer under the bag and basket, the directed plant growing assembly can be placed in any desired location, including inside a building.