I had a 8 mile seedling do the same thing - grew really slow and odd looking, matured about 16" tall and had a thick as my fist bud from the dirt to the top (54 grams cured) and by far the most potent plant of the bunch, and I mean off the charts good. I wish I would have taken a few clones but it looked so stupid and small I thought I might just trash it. Take a few clones when you get a chance, it may be a keeper