I recently made an interior plant wall to bring some green into my house.

The wall is 1m width for 2.5m tall including the water tank.

There is around 55 plants (9cm pots) and 25 plants (6cm pots)

The water tank can contains 100l

Supplies

PVC expanded plate, size of your choice (here 1m x 2m) at least 10mm thickness
Some piece of metal for the frame
Drip hose
Horticultural felt
Some gardening connecting pieces
Water pump
Water tank
Stainless staples
Waterproof rivets
Sphagnum
Plants
Angles PVC for finishing
Gutter

Step 1: Build the Frame

You will need to build the frame to hang the plate on the wall.
I use rivets to fix it. Then I hung the PVC plate with waterproof rivets.

Then, I covered the rivet heads with silicone.

Step 2: Hydro Stuffs

Put the first layer of felt on the plate and fix it with staples.

Then set up your irrigation system. Cover with a second layer of felt, fix the assembly with staples. Apply a third layer of felt. You will cut pockets to put the plants inside.

Step 3: Green It !

Now is the time to add green into your home!
Cut the third layer with scissors to create pockets and put the plant inside with sphagnum. Then put staples to hang it.

Step 4: Final

Now let Mother Nature do the work for you.
Rest and look at your beautiful wall. I spray the wall every 3 days with a programmable plug. As a bonus, you can add an aquarium at the bottom.

Look at these shrimps !

I covered the tank with stones plates.

Bonus: I added strips LED on each edges !