Sulfur Application Rates

[h.h.]

https://www.pthorticulture.com/en/training-center/myth-series-sulfur-drops-the-ph-of-growing-media/

 

[HerbChambers]

Why not add gypsum (calcium sulphate) and let it feed the plants and soil both calcium and sulfur.

 

[paradoxlost]

because gypsum doesn't affect soil pH

 

['Boogieman']

I’ve personally never used sulphur in potting soil. I did try gypsum but have abandoned the practice.

I was going to add gypsum to my soil at 1/2 cup per cubic ft. I'm curious why you abandoned the practice?

 

[paradoxlost]

probably because he was using it to lower pH when in reality it doesn't. Sulfate does not equate to sulfur. Just they have similar constituents doesn't mean shit.

 

[h.h.]

Gypsum is pretty mobile in the soil. I found it clinging to sides of my fabric pots.

Sometimes a remedy in outdoor soil. My understanding is that it can be used to make magnesium more available or to leach it out.

https://s3.wp.wsu.edu/uploads/sites/403/2015/03/gypsum.pdf

 

[h.h.]

Azomite

https://www.azomiteinternational.com/studies/feed_matrix.html

 

[ThePhiloStoned]

https://www.pthorticulture.com/en/training-center/myth-series-sulfur-drops-the-ph-of-growing-media/

They aren't actually talking about highly amended "supersoils" here though, they're talking about inert media right? Peat, perlite coco, etc. without any microbial, nutrient or mineral amendments...I mean that was, at least my reading of it.

I guess, according to my reading of this article I should be using an iron or aluminium sulfate for it's faster action. (It did say elemental takes a year to fully work the soil, that is long even if it is quicker & more effective mixed-in than top-dressed).