A planter 10 which defines a planting recess 12 for receiving a plant, in use, and which also defines a ballast cavity 14 for receiving ballast, in use, to provide stability for the planter. The ballast cavity may extend around the perimeter of the planting recess or the cavity may extend continuously around the entire perimeter. When the planter is in use with the planting recess open from above, the cavity may widen towards its base. The planter may define a plurality of planting recesses and/or a plurality of ballast cavities.
