- Rock Wool
- Clay Pebbles
- 2″ Net Cups
- Hydroponic System
- 2″ hole cutter
- No. 25 tap
- PVC cutter
First, place the rock wool into a tray. Next you will want to apply an amble amount of water on the rock wool. You should notice a small pool of water at the bottom of the tray. Finally, place a single seed into each rock wool hole or section. The seed will likely take 1-2 weeks to germinate.
As soon as the first seed begins to sprout, you should apply the light for a minimum of 18 hours per day. Add water as needed. No need for nutrients, yet.
Tub System Build
Dimensions will change based on tab size. I used a Greenmade 27 Gallon tub that I picked up at CostCo.
Using 3/4″ PVC pipe, I made the following cuts.
- (2) 1 1/2″ – for center
- (4) 11 3/4″ – for center
- (8) 4 1/4″ on short side
- (2) 23 3/4″ – on long pipe
You will also need 7 T fittings and 4 corner fittings to complete the irrigation assembly (no glue necessary).
Next, I tapped No. 25 holes into the PVC in order to screw these nozzles.
Before adding the water pump, be sure to cut a hole in the side of the tub to allow the power cable to escape.
After the seedlings have their True Leaves, then it is time to transfer them to the net cups. Add clay pebbles to ensure the rock wool is held in place.
Using a 2″ hole cutter, cut a grid of holes in the tub lid. Place the net cups with the seedlings into the holes.
I leave the lights on 24/7.