View Full Version : sulphate of potash organic???
is sulphate of potash considered organic? does it have any negative aspects. thanks :farm:
08-31-2006, 08:32 PM
Natural, mined Sulfate of Potash is considered organic.
are products without the naturally mined description considered non organic, heres an example http://www.gardenhealth.com/product_range/straights/potash.php
can i use this product without destroying all the good life in my soil?
09-01-2006, 06:50 AM
keep in mind that box says 35g per m2
09-01-2006, 09:40 AM
thanks for the replies ive found an organic mined source which i will be using (not the product in the link) cheers.
09-01-2006, 09:15 PM
Have you tried the sulfate of potash as a compost tea additive, and if so, with what result?
The only concern, other than over-application, seems to be a possibility of too much Mg if using Dolomite at the same time. Since canna often seems to lack magnesium, is it really a concern in this case?
Im going to use potash sulphate to correct the low K and S levels of canna coco+PK13-14 profile, but im afraid it can affect ph if the SO4K2 react with other salts in the solution (not organic grow). The ph of SO4K2 dilution gives me a bit less of 4. Anybody has experienced it?
Bopper, can you explain why the potash sulphate can increase the mg absortion? (i though that K+ compete with Mg+)
I believe over application of SO4K2 is very difficult, toxicity level of S and K are really high.
09-02-2006, 12:25 AM
Isn't Sulfate of Potash actually Langbeinite - K2Mg2(SO4)3, not just SO4K2?
Now i undrstand. I buyed directly the SO4K2 (98% pure), or thats what i though. I musk check it.
09-02-2006, 12:44 PM
i never used it in my tea's just small amounts when i make my compost piles.
here is an intersting article about organic applications
09-04-2006, 06:35 AM
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