Is it starting to become clearer on how to hit NPK and get a handle on PPM Dabber? It’ll become old hat in no time. Ase does it all by feel at this point, but I come up with a formulation on my own and then I can mix it up quickly without any real thought.
This week for example I’m in week 5 flower. My target is 1-3-3 / 900 PPM. I’m mixing, in my 14L bucket:
18.5 ml CalMag at 1-0-0 = 18.5-0-0
15 ml Flora Micro at 5-0-1 = 75-0-15
5 ml Flora Gro at 2-1-6 = 10-5-30
5 ml Flora Bloom at 0-5-4 = 0-25-20
32.5 ml KoolBloom at 0-10-10 = 0-325-325
1.85 ml Floralicious Plus at 2-0.8-0.02 = 4-2-0
Add all those up, and you get 105.5 / 356 / 390, which is about 1-3.5-3.8 and 900 PPM on the nose.
I follow Ase but he encourages using his feeding as a guideline, and I’ve been burned by shorting my PK boost in the past, so I don’t mind wandering up a little higher on the PK. I tweak Ase’s schedule here and there based on what I see and my own experience.
How did I arrive at this formulation? Well, I know my water + CalMag got me above 200. I knew the KoolBloom would add about 10 PPM per ml based on what’s on the bottle. So I knew I had 500+ PPM accounted for from my water, CalMag and KoolBloom. I took a guess at Micro, Gro, and Bloom values that would fit the PPM target and meet the NPK ratio target. When I added the KoolBloom the first time, I did it 5ml at a time and measured PPM to see how it was. I knew if I shorted the KoolBloom I’d still end up with the ratio in the right ballpark. I intended to put up to 35ml of KoolBloom in but saw at 30 that my PPM was close, so I cut it short, added my Floralicious Plus and got it right on.
There’s an element of trial and error, but if you get a handle on what each component tends to add to the mix, you can make educated guesses.
I take note of what I put in and what the resulting PPM is and adjust until I get it perfect. So I kept a record this grow of what I put in every week, and for my next grow, I can simply look at my chart to get the formulations perfect every time.
Hope that makes sense!