"Ram horns"/"Eagle claw"...usually caused by an issue in the root zone, such as over watering, not enough oxygen in the h2o/root zone, pythium/root rot...to name a few.
I agree with blacksun about no oxygen in the soil, cuz you mean the dirt that was there already right? And no nutrients durring flower, that's a NO NO, I mean mother nature does it all the time right, well ya, but I don't smoke regy...so start with some mild nutes (1/4 strenght) and hope for the best..good luck and welcome to RIU
Cool thanks yeah I thought it might be not enough oxygen in the soil or do you think perhaps its because the soil is hard the roots can't grow do you think that might be the reason my plants would do this ? Because some parts of the soil get really hard and don't absorb water to well