here is the tried and true method to get nearly 100% success. First off, don't use tap, either R.O. or store bought water. Get yourself some
Grodan cubes (the ones that come 45 to a pack are a perfect size),
clonex gel and
clonex rooting solution, razor sharp scissors, clone tray with dome, florescent light, rubbing alcohol, a big bowl to soak cubes, and a cup to have water in. In the big bowl, have water with
Clonex solution mixed in to soak cubes (
Clonex is 2 teaspoons per quart, so 8 teaspoons per gallon). Soak cubes in solution, then squeeze excess water out. The cubes should have some water in them (dont squeeze them out too much). Put cubes in tray.
Now take cuttings from strong mother plants with strong branches. Cut about 3-4 nodes down from the tip. Quickly remove excess foilage aside from the top 2 or 3 leaves/nodes. immediately put the cut end into water and recut the end under water at a 45 degree angle. This will ensure there is no air bubble in the stem which will cause the cut to die. After cutting end under water, immediately remove and dip into
clonex gel. Have a little bit of gel in a shot glass so you don't contaminate the whole bottle. After dipping put in cube and repeat the process. Once you have taken your cuttings, spray the inside of the dome with water and put it on (i keep the vents closed, some people say leave them open, but i find the cubes dry out too quickly if you do that). I then put the dome under a compact flourescent in a small hut. The hut stays warm from the flourescent so i never use a heating mat. you want the cuts to stay around 80 degrees. too cold they dont root, too hot they rot and die. if you use a mat, make sure to use a regulator for it cause the mats get too hot on their own and will surely kill your cuts. I agree with the guy 2 posts above that said that the flourescent creates the exact amount of heat needed, so I say skip the mat. Keep the clones misted, though I only mist the first time. I never take the dome off until about a week later when they have rooted, though some people will say to burp the dome daily. It's up to you, but just check on them daily to ensure the dome is still humid inside. You should get 100% results if you follow these directions to the T.
oh, and may i add that if you follow this, you can skip ph-ing the water. I dont own a ph meter and never will. It's not necessary unless you are growing in hydro or aero. Just make sure to use store bought or R.O. water, No Tap!!!!!