This is a great video on how to build a vertical garden using rockwool covered in shade cloth. There in no information however on the frame and water collection construction. Episode 5 (16/05/09).

Step to creating a Vertical Herb Gardens

1. Construct a strong frame. Expanded propylene Sheeting or Marine Ply will work well.
2. The inert growing medium used is called Rockwool, which acts as a super sponge, holding many times its weight in water. The Rockwool slabs are held in place by knitted shade cloth.
3. The next step is setting up the reticulation system. A pipe comes out of the micro-pump, which is situated at the base of the frame in a mini-reservoir. The piping extends to the top and along the top edge of the frame, with drippers that plunge into the Rockwall. This creates a circulating hydroponic system.
4. Then, make small incisions into shade cloth and tiny planting holes with your fingers into the Rockwool.
5. Knock as much soil as possible off roots of the plants before tucking roots into prepared pocket. Use a small piece of wet Rockwool to hold them in place.
6. A great range of herbs can be planted in the Vertical Herb Garden, including; Coriander, Sage, Chives, Basil and Mint.