Would you recommend a soil like roots organics or ocean forest to someone like me? This is not the first of my threads that you've helped me out in. I frequently have some issue or another. I amended the crap out of my SSA#4 trying to avoid issues like this, and got them anyways. I'm pretty knew to it still I suppose.
All I really can say is the solution is to pick a medium and nutrients and use them until you get good at it.
I have been using mine for two and a half years and just bought more. And most any complete and well made stuff can work well.
I keep it very easy. I use unadjusted well water in ocean forest from seed usually and only add pure Blend Pro Grow when it is needed after a couple to three weeks in flower. Then a mild avg 10 ml solution unadjusted as usual every watering.
Starting at 5ml and tapering up to peak flowering and then down the last 2-3 weeks usually ending at 5 or water only.
If something goes wrong it is one of those three things being mis managed.
Or it's the environment. Which is likely in my ventilated room. So I turn down the humidifier some. Back off the lights. Adjust the fans. Etc.
So I keep trying to get the nutes right. Water the perfect day right at lights on. Get the light distance in the sweet spot. Etc. and it all keeps getting better more than worse.
I tried different soils and nutes in the beginning. I never learned anything for sure that way. I have plenty of old bottles laying around.
Good wet dry cycle and not too much fertilizer seems to be key. When I tend to over water even a little bit it screws up an amended soil grow until I stop it.
I let the pots dry 3/4 down when probed with a cheap moisture meter. It needs to be in the middle or low end of where it says dry.
I also like to read all about the products I use starting with the product website. Many like pro mix have educational pages they are very good. Just not mj specific.
I can't recomend much because I stick to what was in my town when I moved here.