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Two part NPK % ?

calstar

Member
Two part for flower. Part A is 5.4/0/5.6. Part B is 1/3.6/8.2.
How do you figure out the total % of the NPK when A and B are combined? Can the ppm be determined for a given application, i.e. 8ml/l once the % is calculated? thanks
 

ShroomDr

CartoonHead
Veteran
IF you use equal parts A + B AND they have the same g/mL (weight/volume), then yes you can add 5.4-0-5.6 and 1-3.6-8.2 to get 6.4-3.6-13.8. But... with that much K, i doubt they are suppose to be used in equal parts; that seems like a lot of K.

To figure out the actual elemental parts per million, you need the g/mL (weight/volume) and the cannastat nutrient calculator website approximates it pretty well.


No you cant determine the 'ppm reading' with a given application rate. A 'ppm meter' doesnt measure parts per million, it measures electrical conductivity (EC), and then uses a superfluous conversion to a number manufactures have labeled 'ppm'. Different manufactures use different conversion factors, but this is all needless and only adds to consumer confusion, just use EC. Other things than the actual parts per million elements will effect the EC/ppm reading (Carbs, Liquid Karma, etc).

See the first link in my signature for more details.
 

calstar

Member
Thank you ShroomDr. I don't know if the g/ml is the same as its not on the jugs, but I'll try weighing the jugs for total weight(probably not very accurate) No instructions on the jug regarding anything but inferred mixing of equal parts A, B. As you pointed out the EC reading is to used for comparison, I'm still in the habit of speaking in terms of ppm(newbie grower). I previously tried using the cannastat calculator but it wouldn't function for me even though I have java script. I'm concerned about the ratios of this nute, (agricultural organics from Australia) for my flowering stage, I don't want use something that isn't optimal. I've attached pics of the label for clarification. I'll study your link and try to figure it out. If anyone else has any input please post your thoughts. This is an outside grow in containers with Roots 707.
 

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ShroomDr

CartoonHead
Veteran
So what is the product called? Is it just 'Bloom Coco Flower'?

Here i added it to the thread in my sig, ill post it here too. The cannastat calculator is an approximation, and not having the weight/vol, also adds to the estimation. Regardless, its still pretty close.


Bloom Coco Flower A (5.4-0-5.6) (NH4).36% (NO3)5.04% Ca4.14% Fe.004%
1g/1mL =1g/mL
@5g or mL/Gal
N
71
P 0
K 61
Ca 55
Fe 0.053
Derived from: Calcium Nitrate, Potassium Nitrate, Ammonium Nitrate, Iron EDDHA. 0.004% Thiamine Hydrochloride.


Bloom Coco Flower B (3-3.6-8.2) Mg1.35% S1.71% Fe.027% B.007% Cu.001% Mo.001% Mn.005% Zn.0004%
1g/1mL =1g/mL
@5g or mL/Gal
N
40
P 21
K 90
Mg 18
S 23
Fe 0.356
B 0.092
Cu 0.013
Na NOT LISTED
Mn 0.066
Mo 0.013
Zn 0.005
Derived from: Calcium Nitrate, Mono Potassium Phosphate, Magnesium Sulfate, Iron DPTA, Boric Acid, Copper EDTA, Manganese EDTA, Sodium Molybdate, Zinc EDTA. 0.005 Leonardite Coal.


Upon first glance, this nutrient seems (very) high on K, and low on Ca and Fe. compared to most products.
 

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