How do you plant and maintain a green wall?

It depends on the type of containers you choose: there are "pocket" hangers, there is planting in pipes, you can build wall planters yourself, and there are systems designed specifically for such a garden. Vinea Green's dedicated systems come with all the parts necessary to assemble and hang containers in any number you choose,

Vinea Green systems include a plastic system that includes irrigation for the entire system from just one point, without dripping or flooding. After you have chosen the location (don't forget exposure to light and sun) and the type of containers, all that remains is to fill them with tuff in the part that is in contact with water above the ground, choose seedlings, water regularly, and enjoy lush green growth. Vinea Green also has hydroponic systems in which plants grow without a substrate, but only in water and fertilizer. Recommended for growing vegetables and not for decoration.

Link to Wikipedia Green Wall – Click here
KGreen Wall Project Guidance – Click Here