If your reliable soil recipe calls for green sand then get some and add it as soon as you can. I've just never added half of the ingredients I see in recipes.
Compost, castings, bone meal, more castings and Potting soil along with Perlite and vermiculite, cuttlebone, kelp and potash is all I use. Most is foraged.
I'm not saying my soil is the best or better. I'm saying these plants are the kind you have to try really hard to kill. They survived in the wild for way longer than any modern soil recipe has been around. They do just fine without humans doing anything.
On those super hot days, I spray them down with the hose during the hottest part of the day. They love that. It often rains in the hottest months where they come from.
Compost, castings, bone meal, more castings and Potting soil along with Perlite and vermiculite, cuttlebone, kelp and potash is all I use. Most is foraged.
I'm not saying my soil is the best or better. I'm saying these plants are the kind you have to try really hard to kill. They survived in the wild for way longer than any modern soil recipe has been around. They do just fine without humans doing anything.
On those super hot days, I spray them down with the hose during the hottest part of the day. They love that. It often rains in the hottest months where they come from.
Thank you for your time in helping me with this. 
. Bigger than the Redwood trees in Cali. lol 
CL
they now finally seem to be growing faster. I'm still concerned that the amount of the artificial light was not correct, perhaps confusing and slowing them down just a bit. Because of this, I'm now considering building a very small greenhouse, complete with warming pad for next season. This will allow me to put them outside immediately after potting them into dixie cups, so they can have a sunlight schedule 
Unfortunately, it looks like nutrient burn:
