Originally Posted by Shmavis
Have I missed the question of whether any of this is relevant when growing from seed?
Of all that holes that one can fall in, Calcium is the biggest. The reason is simple, you can't recover from a Ca deficiency, ever. So everyone pretty much starts with a ball and chain around their neck and then want to run.
This is why I get folks to run soil analysis correctly, using procedures for the type of media/soil that one is in. Those that have gone this route and applied their Ca up front in adequate quantities against K, Mg and Na, see excellent results.
Having more K than P, same issue, hard to catch up on that one too.
So yes, roots are roots. Just that if a Mom is malnourished, her clones are not going to form callus on the cut. Many seeds lose viability or have problems for the same issue, not enough reserves, especially Mn.
I will take some photos in February of a couple of grows that I work with to demonstrate my point regarding callus formation. I will probably post those in my thread though... slownickel lounge. Check it out. Lots of analysis, science, results!