A shelter 1 for a growing plant, usually called a tree shelter, which is formed from a single blank of plastic material which has formed therein fold or crease lines 2-8 by any suitable means, for example by welding. The crease lines extend transversely of flutes which are an integral part of the material, which is suitably that sold under the registered trade mark "CORREX". The crease lines 2-8 are positioned in the blank so that when folded about them, a substantially square internal growing area 9 (in which the young tree (not shown) is situated in use), is formed, parts 10, 11 and 12, 13 of the shelter 1 being overlapped to form a pocket 14 at a corner 'C' of substantially triangular configuration for receiving an elongate support member such as a wooden stake which is inserted in the ground to support the shelter. The overlapped parts 10, 11 and 12, 13 are secured together where they contact by any suitable means, such as for example welding 8, the arrangement of particular hinge lines 6, 7, 8 being such that a base of the triangle is formed by an intermediate part 15 bearing an intermediate hinge line 7, of the flap 11, 13. <IMAGE>
