Expandable Hydroponics System from Junk - Flood and Drain

Step 4: Planter Support

Drill 1 1/4 inch holes through a piece of 1x3 wooden shelf or other suitable support, spaced as desired or required for plants.

I will leave the supporting structure construction up to your imagination as my skills are very limited and I do not want this to become a lesson on "How NOT to Build a Shelf". The simple structure that I built is very visible in the photo.