I was adjusting my nute mix today and did some number crunching. For starters, here's what I have been feeding these girls:
GLN's Megacrop v1 (9-5-14)
GLN's Calmag Pro (13-0-0)
GLN's Kelp Extract (0-0-15)
Protekt (0-0-3)
phDown (1-5-0)?
I am using general NPK values since I do not know RootFarm's NPK value.
I have been using the KE for all my grows only during veg, as it improves nutrient uptake. Once I hit flower I stop. I only stopped because the info I found said it was used mainly in veg stages. I tried finding the NPK values of it a while back and meant to contact GLN for it as it's not posted anywhere.
Anyhoot, today I wrote to the geniuses over there and they responded within minutes with a value of 0-0-15. A value of 15 for K seemed awfully high and I replied back to see if it was a mistake. No mistake.
So, either I'm really lucky or the numbers are wrong from GLN. So this takes us to farside's spreadsheet for some number crunching.
Measurements are estimated to 1gal, whereas I use 4L
.4g Kelp Extract
1.8g CMP
5.8g MC
.5mL pH down
5mL Protekt
That puts my NPK ratio around 6-3-9.
Again, farside like's to use the following:
So I come out higher on all three levels. It may explain that lovely shade of green Shed keeps reiterating since the N is almost double farside's numbers. Is it working? So far.
However, when I alter the formula by taking out the CMP I end up with a 5-3-10 ratio. My N drops and the K goes up. This may be good for flower, so I'll continue from here at that level. Now there's the question of do I keep feeding KE or discontinue at flower?
Since the KE is minimal at .4g/gal it makes no difference if I remove the KE or not. So no sense in wasting money.
I haven't worked out the N load as I have to do some weighing of the CMP, but I think it's around 199.
I had some time to kill so the moral to the story is when you add or subtract nutes you should always be aware that NPK ratios change. A N to K ratio of 1:3 and you risk Ca lockout.