I thought you was on about plant's that were a lot further a long,2 week's is fine soak the cube's in a bit of clone - x
I have taken cutting at this age a few time's they will be fine,I have been using aloe vera a hell of a lot with vegging plants
in the past few month's since seeing the piece mendo dope posted on you tube,and i have to admit the plants love it,
I have just rooted 5 clone's in 5 days,,pretty fast,took 5 with cubes soaked in aloe vera and using it has the rooting compound
and then took 5 the normal way with clone x soaking the cube's in a little clone x and using it has the rooting gel,they took 12 days,the seedling's i have going are also loving it has a feed,Clone's like a pk so i see no problem a lot of grower's i know soak there cube's in flowering nutes very light soak but it all ways works.
Good luck tyke