Wisconsin worm castings, screened and odor-free.

Wisconsin worm castings, screened and odor-free.

Straight worm castings from our family farm in Edgar, Wisconsin. OMRI Listed (kwf-5814) and third-party lab tested.

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OMRI Listed (kwf-5814) · Made in Wisconsin · Lab-Tested

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Cheap compost vs. Sweet Leaf castings

Straight worm castings. No manure, no fillers. Adds organic matter and helps improve soil structure. Odor-free.

Cheap compost vs. Sweet Leaf castings
Before
After
See the difference
Adds organic matter

Adds organic matter

Straight worm castings that add organic matter to potting mixes, beds and top-dressings. Our 2025 lab sample measured about 53% organic matter on a dry basis.

What's inside

Straight Worm Castings

Adds Organic Matter

No Fillers or Manure

OMRI Listed

Why Sweet Leaf

  • Adds organic matter

    About 53% organic matter (dry basis) in our 2025 lab sample.

  • Low soluble salts

    1.01 dS/m in our 2025 lab sample.

  • Straight castings

    No manure, no fillers, no compost blends.

  • OMRI Listed organic

    OMRI Listed (kwf-5814) for use in organic production.

Trusted by growers

OMRI Listed

OMRI Listed

Listing kwf-5814

Made in Wisconsin

Made in Wisconsin

Family worm farm

Lab-Tested

Third-party lab reports

Raised on our family farm in Wisconsin

Raised on our family farm in Wisconsin

Our worms turn sphagnum peat bedding and a grain-based diet into screened castings. Lab-tested, bagged and batch-coded on our farm in Edgar, Wisconsin.

Our story

#SweetLeafSoil

Questions, answered.

Are they high in salts?

No. Our 2025 lab sample measured 1.01 dS/m soluble salts. Start light and follow the use rates.

Is it OMRI organic?

Yes. OMRI Listed, listing ID kwf-5814. Lab analysis · Pathogen & metals COA

Does it smell?

No. Properly processed castings are odor-free.

What's in it?

Worm castings from sphagnum peat bedding and a grain-based worm diet. No manure, no fillers, no synthetic additives.

How much do I use?

Top-dress or mix ~1 part castings to 4 parts soil.

How is this different from compost?

Castings are made by worms, not in a hot compost pile. Ours have no fillers and are screened fine.