Maybe u didnt try the real one
I got my clone from Sr71
I am no expert but I grew her next to purple kush which is suppose to be all indica , and the GreenCrack grew differently . More of a branchy sativa type growth . hard to tell which stem was the main one . she wasnt a big stretcher either . I think it was some type of skunk cross .
I didnt think she was super strong but tasted great and had a good up high. also the high might last about 1hour