how old are your clones?

I took some clones a few weeks ago, trying some stuff out. jell2root (they are these self contained cubes with jelly/jello rooting stimulators, come in 6 cubes a pack, got them at Osh, )
i tryed it a few years ago and it made massive roots, but the plant didnt take too well once transplanted into dirt or the strain didnt like to be cloned, i had a few left over and said what the heck... we shall see!