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Trellis, green wall and irrigation #2

Looking to have a green wall installed between posts on pictures. Need to install some form of treated weatherproof board, trellis or tray system that can support planting and block out this area for privacy. Would like irrigation to the wall and the planter beds installed - hose tap location can be seen on 1st picture. Would ideally like to install lighting in this wall in the near future so would need to consider this with irrigation system. Dimensions of this area are approx 4.4m L x 2.6m H (2m high if taken from top of planter). Will need the 3 posts currently installed here cut to height of wall on completion. Would also like ideas on trellis / screen to the right side of the path approx 1.9 L x 2.4m H (needs to be free standing).