It looks like you're seeing some early signs of foxtailing, but honestly, at week 10, itās nothing to lose sleep over. While foxtailing is often triggered by environmental stress like excessive heat or light intensity hitting the top of the canopy, some Sativa-dominant strains are genetically predisposed to grow those tower-like structures naturally. Given that your plant looks healthy and you haven't noticed any major stressors, it is likely just a genetic trait expressing itself as she reaches full maturity. Just keep an eye on your temperatures and light distance to be safe, but you're doing great. Happy Growing Growmieš±