Cut branch about 4-5" tall, trim off all nodes and leaves except top2 or 3, trim 1/3 of leaf tips off. Dip in OMRI listed liquid kelp, make hole with chopstick, place into coir; let the stem come out of the bottom so there is 1/2" coming out the bottom/in open air (this is where rooting starts in 4 days.) Put in tray, mist once, put on dome with heat mat under it set at 78-80F. Ideally cooler air temps 68-72F The coir IS compressed into the cubes not hard but slightly firm. Don't touch anything come back in 4-7 days and look at roots. Completely hands off for the first 4-7 days. Maybe need to H2O with plain RO at 7-9 days if it got too dry. The roots make the coir form into a cube and it can be pulled out to be used as a rockwool cube would be.