Abstract: A potted plant shipper which incorporates elongated plant holders within an outer fiberboard container. Each of the holders is formed from an integral blank which is foldable into three walls, plus a pair of partial cover panels. Locking flaps close the respective ends and secure the elongated holders in tubular form. The outer container locates the elongated holders in side-by-side relationship on its bottom panel with the foliage extending upward into an open region. The end flaps of the containers cooperate to provide a pair of inward-extending hold-down flanges which overlie the ends of the holders to prevent upward displacement during shipping. The end flaps interlock with one another to secure the closure.