Im always learning.Dam dude...six years and you haven't learned to grow yet?
Oh me too for sure....The day I think I know everything is when I find out I don't know shitIm always learning.
Been over ten though, member for 6
Yes,Usually when leaves yellow from the bottom up, its a possible sign of Nitrogen deficiency.
Please add one more picture... a pic of the entire plant.
I make my own chemical ferts.Yes you would need to up the amount of N, to the same amount of Phosphorus your using.
What fertilizer are you feeding?? What is the NPK?? How much Magnesium are you feeding?
I myself dont use cal/mag as the fertilizer I use derives its Calcium from Calcium Nitrate, ( 15.5-0-0 )and then I add Epsom Salts/Magnesium Sulfate for my Magnesium, and Sulfur.
You're probably right...I'm typing here in the dark and I only saw one flower...so it was just a guess.Looks to me the buds are very early in flower. Nowhere near week 9. More like week 3.