Unknown Strain - Australian Bush Sativa

The last two weeks have been a battle with the sativas ! A little more he says, plants love nutrients he says, what harm could adding a regular dose of potash to my Aptus nutrients possibly do he says 🤦‍♂️🏽 leaf tips curled up like that’s it! I’m gonna curl up and die now haha poor girls I also simultaneously noticed a lime greening/yellowing of the leaves which could have been somewhat related but also unrelated. I’ve been flushing the soil with straight water which has been having a positive effect, I’m nearly convinced now that these plants are root bound they got so big so quick the root systems must encompass the entire 5gal pots. Being smaller root systems, large plants and insufficient soil:root ratio there isn’t enough potential for water retention, the plant is drawing what water it can while it can but not enough to supply the entire plant meaning I have to overwater to keep them hydrated then they quickly over correct with overwatered plant symptoms. The rest of this grow is going to be a struggle but I’m going the distance. What ever they need they’ll get until they cross the line, right now I’m continuing the flush as best I can without watering them too much I suspect things will correct and go well. I’m still a few weeks away with these two hoping that’s plenty of time for correction.