KIS Organics

Yellowstone Montana 90% Sulfur Granules

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  • Regular price $ 20.00
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Disintegrating Sulfur-Bentonite Granules

Yellowstone Brand 90% Disintegrating Sulfur Granules are a quality sulfur-bentonite product that degrades readily on contact with moisture in the soil. This provides a large surface area of sulfur to be oxidized to the sulfate form of sulfur.

Key things we want you to know

Sulfur content: 90%+ elemental sulfur with 8% to 10% bentonite.

How it works: Granules disintegrate on contact with soil moisture, so the sulfur can oxidize to the sulfate form.

Tested: Heavy metals report below.

Certifications: OMRI Listed

OMRI listed for organic use. Quality sulfur-bentonite granules for agricultural use, made in Montana, USA.

Product Specifications

  • Sulfur content: 90+ wt.-% minimum as elemental sulfur
  • Bentonite: 8% to 10%
  • Color / appearance: Light yellow-green, small split-pea-like solid
  • Bulk density: Approx. 80 lb per cubic foot
  • Source: Produced from high quality "Claus" sulfur
  • Screen specification: Smaller than 5 mesh (0.159 in opening) and larger than 9 mesh (0.079 in opening)

Lab Reports & Resources


Customer Reviews

Based on 4 reviews
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B
Buzzy Funny
Got my pH dialed

Needed to lower pH as per my soil analysis and KiS is the place I trust for all my amendments.

A
Anonymous
No Details

It came repackaged with no application rate. I search of the KIS organics site didn’t yield much more information. I ended up using AI for help.

A
Andy Gruenenwald
Excellent For The Southwest

I live in New Mexico where the ground and city water are both alkali. Been using this sulphur for years to acidify the ground back to a PH of around 6 for vegetable growth. Works fast and consistently. Just wish it weren't so expensive.

P
Pat B.
KIS always has what I need.

Good stuff for lowering pH on my fruit trees.