Abstract: A trellis panel and method of manufacture is described. The trellis panel is comprised of a rigid sheet of wood formed from wood particles or chips or straw and/or plant material glued together and treated to form a weather resistant sheet. The sheet has a substantially uniform thickness. A plurality of openings are disposed throughout the sheet. Preferably, but not exclusively, the sheet is formed from treated oriented strand board (OSB). The holes are formed in the board by a die-cutting device which has a die surface configured to cut a plurality of these openings throughout the sheet.