
All good grows start with good manure.
Brown Treasure is based in San German, Puerto Rico. We have hand-selected a number of farms that align with our beliefs: respect animals, respect each other, and respect Mother Nature.
Our farmers truly love their animals and treat them well. They are free to graze, well-fed, and anti-biotic/hormone free.
Your purchase helps support small farmers and makes a difference in their lives.
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Sale!
Island Coco Coir Dry Brick (10lbs)
0 out of 5$50.00$40.00 Add to cart -
Sale!
Organic Medium Cut Vermiculite
0 out of 5$15.00 – $40.00 Select options -
25 lbs Dry Grains Red Milo Sorghum
0 out of 5$60.00 Read more -
2lb Sterilized Mushroom Grain Spawn
0 out of 5$15.00 – $80.00 Select options -
5 Gallons Willys Blend Substrate Dry Mix
0 out of 5$60.00 Add to cart -
1 Gallon Casing Layer Substrate
0 out of 5$18.00 – $90.00 Select options -
5 Gallon Dehydrated Shredded Manure
0 out of 5$48.00 Add to cart -
Sale!
4lb Island CVG
0 out of 5$20.00 – $1,500.00 Select options -
Sale!
5lb Willy’s Blend Manure Substrate
0 out of 5$30.00 – $1,750.00 Select options



Beautiful Puerto Rico
The climate and rainfall in San German is perfect for achieving optimal moisture contents in all our products.
Our entire process is natural from the vegetation animals eat to the sun-drying process. We are a completely Eco-friendly, sustainable business.
Our Manure Substrate Properties
Microbes
Necessary microbes in tact for mycelial growth
pH stabilized
Ideal for growing
Aged
Leached by the sun and tropical rains for all 12 months of the year

no contamination
Substrates pasteurized, never sterilized
chemical free
No synthetic nutrition added
ready to grow
Just add your colonized grain
Experience the tropical advantage
This is hands-down the best manure you have ever seen.

Increase your yield in each grow
Our island blend substrate was created, instructed, and personally inspected by Willy Myco himself on-site giving us the ability to deliver to you highest quality substrate in the world.