Jennygrows2
Member
I'm getting back into hydro and thought I would get a little more exact with specific NPK ratios rather than following one of the various nutrient schedules.
A common theme I see is a N:K ratio of 1:2. It's pretty consistent across recommendations and somewhat consistent in nutrient schedules.1-3-2 comes up often. I'm also seeing 1-2-2 and 1-1-2. Those all keep the same N:K ratios but P is all over the place.
Adding up the values in a common brand schedule at week 4 of bloom using the boosters comes out close to 1-3-3. Some people have suggested something closer to 1-4-4. I've also seen 1-2-3.
I'm not sure what to make of it, or where to start in testing different formulations. Anyone know why P recommendations are anywhere between 25 and 50% of the NPK content? That seems like a pretty major spread. I know there are a ton of NPK threads on the net, but it seems rare for anyone knowledgeable to come along and offer some insight on how much phosphorus is just right. More likely it's people saying what works for them, but I guess they all work to some degree.
I'm leaning towards a 1-2-2 formula mid flower
Veg: 4-2-3
Bloom week 1: 1-1-1
Bloom week 2: 1-1-1
Bloom week 3: 2-3-3
Bloom week 4-7: 1-2-2
I will have two areas so I can do an alt formula for comparison.
A common theme I see is a N:K ratio of 1:2. It's pretty consistent across recommendations and somewhat consistent in nutrient schedules.1-3-2 comes up often. I'm also seeing 1-2-2 and 1-1-2. Those all keep the same N:K ratios but P is all over the place.
Adding up the values in a common brand schedule at week 4 of bloom using the boosters comes out close to 1-3-3. Some people have suggested something closer to 1-4-4. I've also seen 1-2-3.
I'm not sure what to make of it, or where to start in testing different formulations. Anyone know why P recommendations are anywhere between 25 and 50% of the NPK content? That seems like a pretty major spread. I know there are a ton of NPK threads on the net, but it seems rare for anyone knowledgeable to come along and offer some insight on how much phosphorus is just right. More likely it's people saying what works for them, but I guess they all work to some degree.
I'm leaning towards a 1-2-2 formula mid flower
Veg: 4-2-3
Bloom week 1: 1-1-1
Bloom week 2: 1-1-1
Bloom week 3: 2-3-3
Bloom week 4-7: 1-2-2
I will have two areas so I can do an alt formula for comparison.