The pics are,terrible. Ill take up close bud shots when I get home. Most of the pistils are receeded on the top buds.
I grew this twice before and cut at 8 weeks, but ended up with OK product that smelled grassy.
Can I,maintain,enough Ca if I cut N down a lot? Most of my,N is,coming from calcium nitrate
I wont go into any long details about cation (pronounced cat-ion) relationships, you likely know something about it and if someone doesn't they can goggle it easily
but its generally known theres a relationship or balance between elements particularly that between potassium, calcium and magnesium
there is range and as long as your within that range your plants will sort itself out
speaking in terms of ratios between
potassium: Calcium: magnesium
or
K:Ca:Mg
the range is
3:2:1 to 4:2:1
for example
if your final solution was 150ppm K
and you wanted a 3:2:1 ratio (which would be the top of the range)
that's +/-
150ppm K
100ppm Ca
50ppm Mg
and if you wanted a 4:2:1 ratio (which would be the bottom of the range)
that's +/-
150ppm K
75ppm Ca
38ppm Mg
or
200ppm K
100ppm Ca
50ppm Mg
depending on your EC range
having said that
your mix per gallon
calcium nitrate 1.5 grams
mkp 0.5 grams
Mg-s 1 gram
mix 2 grams
88ppm N
55ppm P
151ppm K
75ppm Ca
42ppm Mg
looks pretty go for the bottom of the range (with a 2:1 - K:Ca ratio)....and depending on whats in your source water ...for example if you have 10ppm Ca in your source water you might be able to drop the calcium nitrate down to 1.3 grams per gallon
typically youd expect to see the ratio lean toward a 4:2:1 ratio in late flower as the K needs increase and you keep the 3:2:1 range during veg
I tend to try and keep the 3:2:1 ratio always but I have more flexibility to do so... and I run DTW which would be different than a recirculating system since the reservoir ratios is in consent change with each pass thru the roots in a closed /recirculating system which could be partly a consideration for fine tuning/plant needs/nutrient ratios
im just guessing, but looing at your current mix ratio and also your pictures and what you said about not having magnesium def at higher EC feeds but having it at low EC feeds
what I suspect is
if your EC is high enough to sustain your magnesium needs then the ppm # for N must be very high proportionately
when you look at the mix your currently mixing the magnesium is very low proportionally to the rest of the numbers
I hope im making sense
but, for you to reach the plants magnesium needs theres going to be a large number in ppm on the N...unless you happen to carry a substantial amount of magnesium in your source water