My experience with all my indoor grows is that the closer you get to the tip of a shoot the more hollow it will be. My plants when harvested, are almost exclusively hollow with the exception being the bottom of the main stem. I have always attributed it to the fact that the plants are basically "babied" their whole life, thus no necessity to solidify the limbs.

I have noticed on the few outdoor grows that I have participated in that more of the branches were solid all the way through. Again, it fell in line with what I had observed in the past so I had no reason to question it. It's been one way I have been able to tell the 2 apart with some degree of accuracy.
irydyum Reviewed by irydyum on . Hollow Stem?? Ok we have pretty much only been growing 1 strain and been happy with that but we finally got to the point where we wanted a lil variety. So on our tent grow we sprouted a "freebie" seed from our last order and have it growing with 4 Medibud plants. Now we have no clue what strain this plant is and we have not dealt with different strains while growing. Last night we took a clone from this unknown plant and when I went to scar the stem before putting into a RR I saw that the stem was hollow. Is Rating: 5