This just doesn't seem right to me, but I have never grown before. I just chopped my first plant and the main stem was completely hollow. I have never seen this in any kind of plant before, or never noticed, and am wondering if she had problems I didn't catch? I cut her at the dirt level and it was solid, but about 3" up it went hollow all the way to the top. She was a chronic ryder 54 days old, grown in a bottle and cut early due to overcrowding. All total she gave me 8 grams dried, she was still budding strong when I cut her and had at least 3 weeks to go.