First thing...don't take growing advise from your friend any more. Best to learn from those that have grown for a while.

Those are too young for feeding, especially with MG. (MG All Purpose, I assume...?) Plus, you should let the roots do their job. When using MG soil, the nutrients last a couple of months. When you add more nutrients on top of that, it can and will kill the little girls. No more foliar feeding till you know how and why.

Take some time and flush the soil well with properly ph'd water, (three to five times the pot volume for each pot) then go through some Grow Logs, and perhaps memorize the FAQ section. It's a good place to start. Old leaves are old news, so watch for the effects on the new growth.