Paph anitum culture

[Ray]

from an old post of his:

Micronutrients

• NaFe EDTA ( Iron EDTA) 3mg
• Mn5O4, H2O 3mg
• Zn5O4, 7H2O 1mg
• Cu5O4, SH2O 1mg
• Na2MoO4 0.2mg
• H38O3 1.5mg (?????? What is that? - my comment, not the original poster's)
• NiCl2 0.1mg

This micronutrient composition is applied to all the feeding, which means at all the watering's I do.

For the macronutrients I am now at:

• NH4NO3 400mg
• KNO3 150mg
• NH4H2PO4 150mg
• MgSO4, 7H2O 80mg

Notice there is no urea - he stated he uses urea on top, whatever that means.

 

[gego]

I think that's Boric Acid and the 5 in Mn5O4 is Sulfate.
If this is per liter, so 3mg of MN SO4, H2O per liter, how much ppm of MN is this?
It can probably be easily followed by many if these are in percent form, like what we see in fertilizer labels.

 

[Ray]

I think that's Boric Acid and the 5 in Mn5O4 is Sulfate.
If this is per liter, so 3mg of MN SO4, H2O per liter, how much ppm of MN is this?
It can probably be easily followed by many if these are in percent form, like what we see in fertilizer labels.

All that can be calculated using the periodic table.

MnSO4-H2O molecular weight is 153.0146:
Mn 54.938
S 32.065
O 15.999 (x 5 = 63.996)
H 1.0078 (x 2 = 2.0156)

54.938 / 153.0146 = 35.9% Mn, so 3 mg of the salt contributes 1.077 mg of Mn, or 1.077 ppm

 

[gego]

Thanks Ray. 1 PPM indeed. But not all can will do this. So perhaps giving the PPM value would be easier to follow.

 

[Tony]

Not Paphs but the difference between k-lite feeding and urea/ammonium based feeding is clear as day in these Catasetinae.

 

[Ozpaph]

so these chemicals come as a commercially available fertilizer which h\is used as a base an adjusted or mixed like a recipe in the kitchen?
Whats the dilution rate used?
thanks

 

[Brabantia]

It's a pity that all this information on fertilizing Paphios is drowned out by the main topic, which is growing Paphiopedilum anitum. How will we find these very interesting informations in 3 or 5 years' time?
Thank you Xavier for sharing your experience of growing Paphios. As a chemist by training, I've always prepared my own fertilizers. But they always had a nitrate nitrogen content of at least 85% of the total nitrogen. The balance was ammoniacal nitrogen. The reason for this choice was that I had understood from the literature on the subject that you need at least 25°C to use urea and/or ammonium in greater quantities, which is not always the case in Belgium.

 

[Ray]

Tony - what were your feeding concentrations with those?