Sulpomag or mixing potassium and magnesium?

[Tomas]

Patentkali, the European equivalent of Sulpomag, is hard to find and when it is available, the shipping costs are high. So I would like to ask if for you mixing Kieserite, as the resource of magnesium, and potassium sulphate can replace Sulpomag

Thanks

Tomas

[sonoranfans]

In ultimate chemistry content there is no difference between KMag, SulPoMag, or langbeinite and mixing your own K2SO4 and MgSO4.  However, the dissolution in soil could be a problem.  KMag et al., is a naturally occuring crystalline substance and contains all minerals in each crystal which are released upon dissolution of the crystals.  If you hand mix pure crystals of the components, the K2SO4 will rinse from the soil faster than the MgSO4.  KMag is a naturally occurring crystal, that is a part quick release and and part slow release fertilizer with dissolution depending on crystal size and oxidation/impurity of contents.  If I had no choice but to to use the pure salt components in a mix, I would add it more frequently  -little at a time- to simulate a more controlled release.  I use any of KMag, sulpomag, langbeinite which are crystals that contain the Mg, K, S.

[Tomas]

These are exactly the words of who knows and I was hoping to read them. A thousand thanks.
I will try to dose the individual components according to the signs of lack. Also because using the Sulpomag, my impression is that potassium is never enough