If you want Guaranteed results for feminized, use hydroponics. Have a good room temp, good pH level, ppm level, good nutes, proper disease and pest control, ventilation room, journal, clean room, good humidity level, plenty of fresh water, good light source, cfl will work just fine. You can do all this at an inexpensive price. Home depot has a lot of useful cheap stuff so you can build a nice tent. Or cardboard with good dark plastic. I use the general hydroponics complete waterfarm. It was 60 bucks, came with bucket resovoir, water drip system, 3base nutes, air pump, pebbles, all for 60 bucks. You can easily build one. Go on youtube. Be sure to control the environment around your plant, that is the most crucial part. Stay away from soil. Its doable man, if they can do it so can you. Just be smart and patient. Do your research.