What Pee Ratio are you using for your seedlings? How often are you fertilising them? I'm assuming thats a promix type medium so no nutrients in the medium?
Herbs of the field are a blessing from our Creator, the Lord Jesus Christ. No where in God's word are people taking a herb and smoking it. Consider using cannabis in its natural state and see the amazing health benefits you receive with THC-A and CBD-A (precursor to heating the flowers).