Ya might wanna try again. Couple thoughts-

You want the media moist, not wet.

Some like peat,some don't.

Media should drain well- toss in a little perlite if it won't.

Rootone is fine, but just the dip should do ya- there's a lot of IBA in there, and some copper sulfate IIR- I wouldn't bed the plant in it.

Seven days is not all that long- these could still make it.

I think you want your media a bit dryer, and your air a bit wetter.

You could also try 18/6 or 20/4- while I always seem to get the best results at 24/0, the actual data (gasp!) says that you should get quicker root development with a dark period. Not sure if it's actually related to photo or to the gentle swing in temp- I can't find a biochemical reason why the dark period should help, but I'm not gonna argue with actual data. U of Mich Dept. of Agronomy has a better sample set then I do- tho I'm working on it.

Play around with a bunch of scenarios- when you find the one that works for you, you have a winner. Worst case- you have way too many cuttings rooted, and have to select the most vigorous. Not a bad problem to have.
rhizome Reviewed by rhizome on . Hey! Stop Cloning around !!! ok I have a few clones. taken 7 days ago. They are browning at the tips and turning yellow. They are dying. I noticed NO root development. They were dipped in rooting powder. Placed in professional potting soil The rooting powder was also sprinkled in the premade hole. They were placed into peat pots and the peat pots were placed into ph 7.0 warm water and a fish tank air pump is placed into the water for extra oxygenation and they are under 24/0 CFL air temp is 80 F with 50% humidity. Rating: 5