Does N-P-K stack?

kalichackra · Aug 26, 2009

Hello fellow green thumbs! Im looking for an understanding as to what happens to NPK when it is mixed. In general I am speaking of a bubbleponic system being a 5 gallon bucket. A fertilizer ask for 3 tsp per gallon. The value of the fertilizer is 2-8-4. After it is added to the bucket does that mean that I now have a 10-40-20 solution or just a high concentration of 2-8-4? If two different fertilizers are added together for example 2-8-4 is added to 2-1-6 do I now have a 4-9-10 solution or is each one doing its own thing?

cflMAN · Aug 26, 2009

kalichackra said:
Hello fellow green thumbs! Im looking for an understanding as to what happens to NPK when it is mixed. In general I am speaking of a bubbleponic system being a 5 gallon bucket. A fertilizer ask for 3 tsp per gallon. The value of the fertilizer is 2-8-4. After it is added to the bucket does that mean that I now have a 10-40-20 solution or just a high concentration of 2-8-4? If two different fertilizers are added together for example 2-8-4 is added to 2-1-6 do I now have a 4-9-10 solution or is each one doing its own thing?

good first post, :wall:

Tedjones2009 · Aug 26, 2009

way to help him out. for your first question, no as long as you add 3 tbl per gallon.

fish601 · Aug 26, 2009

stacks npk is npk

kalichackra · Aug 27, 2009

Ok makes sense as long as I use 3stp per gallon then I basically have what's on the front label. So to answer my own second question if I use 2-8-4 at 3tsp plus a second set of nutrients of 2-1-6 at 3tsp then I have a solution of 4-9-10. Thanks for input.

wilsoncr17 · Aug 27, 2009

It doesn't stack. The NPK is a representation of the percentage in the nutrient mix. If you add a 0-8-4 in equal parts with a 4-0-4, it will be a 2-4-4 mix. Otherwise you could in theory have a 50-50-50, kind of hard to have more than 100% of something.

kalichackra · Aug 31, 2009

You lost me on that one wilsoncr17 :neutral:

Does N-P-K stack?

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