The two bigger ones have had it rough not sure if I have an n def or not but there two months old been growing in pro mix wormcasting mix the whole time with a shot of seaweed juice every week so there's not much n in the soil to begin with. I thought it was a mag def hit it with epson salts twice and ended up with a cal def on one round of leaves. So it is not a Mag deffeciency. Growth is still good but starting to yellow real hard on bottom of plants. I have Alaskan fish emulsion I think I'm gonna use once they come outa shock and perck up a bit just to see if it helps. The bigger pots have a 3part mix of ffof ,happy frog and chunky perlite. Once the roots get to it I think it will provide plenty. Any thoughts? Also root mass on one blueberry headband seams small I think it may be a dud plant but I'm gonna see what it does