So part of having a greenhouse is having the advantage of being able to set up permanent irrigation which is a time saver for me!
So I will keep this entry short, there really isn't much to explain here.
I am using a dripworks "system" But to be honest... It's 5/8in irrigation line and a few twist loc fittings made for the line, the emitters are Rainbird 1 gph (don't buy these, the dripworks emitters are far higher quality) , and the drip line is a flexible vinyl 1/4in line. All you need is a punch tool and a decent pair of pliers to punch the emitters into the line.
I use a 30/40 psi pressure regulator, and quick connect hose fittings.
I tried to branch as many lines together, each tray gets one line, 3 lines per shelf, 9 lines per shelving unit.
And some seedling progress pictures! Most are just breaking the soil now.