smoke24answered grow question 4 years ago When growing in super soil you still need to amend with nutrients every 3 weeks or so. If you haven't given them anything other than what was initially in the soil, then the problem is that they need food. Those plants are definitely not getting enough nitrogen. Check soil ph first, you want 6.5-6.8 in soil, if thats good then you need to top dress with an organic nutrient. A shot of recharge wouldn't hurt either. Happy growing.