I take about six branches off the bottoms of my plants the day before I flip them to 12/12. I take clones from my branches and put them in Jiffy 7. I put 40 clones in a tray and I put domes on them and dont touch them for about 6 days. I then prop the domes up with 2 inch screws and spray them about 2 to 3 times a day with str8 ph'd water. They are usually ready to plant on day 10. This works great for me. I lose maybe 10 clones out of 500.