I have 4 dwarf low flyers about 2 weeks into flower. They all look great but each one seems to be a very different plant than the other one. One is over 4 1/2 feet tall and kind of stretched looking, another is 18 inches tall and looks like a big bush. The other 2 are in the middle somewhere. All are flowering well but each flower is very distinctly different than the others. Soil, nutes, light, everything is the same as far as the grow is concerned. I guess my question is, is it normal for there to be such a dramatic difference between plants that are the same strain?