I don't know Jack but I fried the butt off some of my week old blueberry seedlings by starting out at 400/ppm and the ph was ok so they definitely sucked up SOMETHING... I generally start my seedlings off right away on 300/ppms...50/50 Cal Mag and Pro Grow....do not wait for several nodes and have never had them burn on that. I know there are tons of folks who say don't nute babies but I do...always have and will continue to. SO THERE

I do think the problem was in the ph....can't be hopping around like that. I really don't think there was any under or overwatering involved. I will, of course, immediately deny this if I am proven wrong....