Step 3: Step Three: Assembling Pop Bottle Plant Propagator
Ok Now that you have cut out the middle of the bottle, take the top and bottom parts and push the top into the bottom all the way.
They you go a pop bottle plant propagator, i made about 50 of these and just add your at least 3 inch plant cutting and water.
Water level should be less then half the bottom piece. too much will rot the root.