I have cloned endless sky from DR.greenthumb, in my diy aero cloner with 100% success and in rockwool cubes but i seem to have a problem with them throwing very weak root and then start to die.I have attempted this about 8 times already and out of 25 on avg only 9-12 stay alive.
i use clonex with water at 400 ppm with maxi grow ph 5.5,
this is the only strain i have that gives me problems
i am not sure but im guessing you would get pretty good results, everyone the uses rapid rooters that i know has good sucess but then again i never heard of anyone trying the endless sky in them.i dont kno y that strain is so hard to clone.