@nix_nix, Good catch! I should probably be more accurate with my nutrients. I basically follow the recommended portions -- so I'm more or less providing the Advanced Nutrient's schedule. What I mean to say is that I use double for Bloom/Grow than I use for everything else.
Typically, I use 3 gallons of water for my nutrient mix. That's usually more than enough to cover my 7.5" line I use as a reference for top water level (once roots have reached it, of course). So, here's what I do for a 3 gallon mix: 20ml of grow/bloom. 10ml of everything else. That's total for 3 gallons of RO water.
Depending on what week you're on -- some weeks in AN's schedule include more nutrients than others, which will naturally increase the PPMs. Generally, though, this 20ml base and 10ml everything else (per 3 gal) gets me around 650ppm. I usually will add a bit more RO water to it and mix it up to get it down to the level I want. So it'll take another quarter - to - half gallon to get me down to about 550ppm.
On the other side, if I'm changing two plants at the same time -- let's say they're in the veg state together (AN schedule doesn't change much during veg), then I might add two gallons to that 3 gallon mix and bring it down to something like 300ppm, which is usually good for plants that are 2-4 weeks old.
So, you're right -- I should be more transparent about my data so that others can learn from my mistakes. Hope this clears that up. I maintain AN's proportions, but then water it down.
You can cut the 20/10 ml in half to 10/5 ml and get around 300-400ppm, too. Play around with the numbers, but 600ppm is usually pretty hot for most autoflower strains. My goal here is to reduce the amount of wasted expensive nutrients.
Great questions!
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