On the question of limestone growers...

[MikeInOz]

Hahaha, as long as my plants are not complaining, I am fine with these mathematical calculations
One last question - with my NPK sorted out, what will be your recommendation for the dosage? Is 1ml of each of three (ie 3 ml) in 3 litres of water sound right to you?

It's the recommended rate in the instructions that will give you the claimed percentages on the analysis. (provided it's a guaranteed analysis of course)
So if you tell show me the instructions on the pack, I can work out the ppm you would be giving the plants if you followed them. Then you can adjust up or down according to your wishes.
or you can work it out yourself....
Multiply the % of the nutrient (N) in the concentrate x 10 x the number of ml to be used per litre to obtain ppm of the N.
How much you use depends entirely on how often you use it. Every watering? every second watering, every 4th etc.
For every watering, 25 ppm N should be enough in a mix with soil etc. Every second, 50ppm etc.
It's all pretty flexible with cacti because they store everything.

[abhikjha]

Thanks Mike. I will be using with each watering as my soil is pure mineral just like Steve

Here is what it says on the label:

[jerrytheplater]

Just a word of caution. If you mix your 5-0-1 fertilizer containing Calcium with the other two which contain Phosphate, you will get a precipitate of Calcium Phosphate, which is insoluble. Are you sure the company is saying to mix all three products into one container? Maybe they are saying to apply the 5-0-1 apart from the other two?

[MikeInOz]

Thanks Mike. I will be using with each watering as my soil is pure mineral just like Steve

Here is what it says on the label:

So, 1.32 ml per litre of the 5-0-1 will give you 65ppm N.....I think..

[abhikjha]

Just a word of caution. If you mix your 5-0-1 fertilizer containing Calcium with the other two which contain Phosphate, you will get a precipitate of Calcium Phosphate, which is insoluble. Are you sure the company is saying to mix all three products into one container? Maybe they are saying to apply the 5-0-1 apart from the other two?

Thanks Jerry. The company in India who recently launched these hydroponics fertilizer has just copied General Hydroponics well known and regarded hydroponics fertilizer. Here is the link:

https://generalhydroponics.com/products/flora-series/

Everything is just copied pasted including the names (Gro, Micro and Bloom) and they launched much cheaper version in India

And General Hydroponics advices to mix their fertilizer in equal proportions.

https://generalhydroponics.com/faqs/how ... ies%20here.

One advice they give is not to mix everything together, rather wait for one to dissolve completely and then use another one.

Though I have written to this Indian company asking the mixing order. Let's see what do they have to say.

[abhikjha]

Thanks Mike. I will be using with each watering as my soil is pure mineral just like Steve

Here is what it says on the label:

So, 1.32 ml per litre of the 5-0-1 will give you 65ppm N.....I think..

Thanks a ton Mike, so it will be 1.32 multiplied by 3 (of each bottle) in 3 litres of water.

[abhikjha]

Though I have written to this Indian company asking the mixing order. Let's see what do they have to say.

They replied back saying this:

A: Do not mix in concentrated form. Give each product one by one only to the system. Problem of calcium phosphate formation will be minimal or Nil

Their instructions are also same as what General Hydroponics say to mix them together.

[jerrytheplater]

So, 1.32 ml per litre of the 5-0-1 will give you 65ppm N.....I think..

Ha Ha says he, should I say something about 0.02 ml? Nah, who is going to measure it that closely anyway. Says he.

[MikeInOz]

Ha Ha says he, should I say something about 0.02 ml? Nah, who is going to measure it that closely anyway. Says he.

Exactly! Just make it 1.5ml and be done with it...

[abhikjha]

cool, thanks a lot Mike, Jerry and Steve!!