Yes could be ,because the soil comes already optimized with correct ph and nutritions for first 3 weeks.I do not know if I should start feed her with veg or grow nutritions she start to show signs of flower 15th day from sprout.Its cal/mag def.Its cause u dont feed her any micro and mycro nuts....Use veg nuts like 20-20-20 or .....(npk)and how can u talk about your ec of u didnt feed her?!?