Welcome to the Brown Treasure Community!

Brown Treasure started with a simple belief: mushrooms matter, and the tools used to grow them matter just as much. After years of cultivating and refining our own methods, we saw a need for grain and substrate that growers could actually trust — products made with care, consistency, and real-world experience behind them.

Our goal is to remove friction from the growing process so more people can succeed, learn, and keep growing. Whether you’re just starting out or refining your technique, we’re here to support your journey with quality products and honest guidance.

If you ever need help, advice, or troubleshooting, reach out. We’re always happy to help you move forward.

If you have any questions regarding our products or the navigation of our site, click the button below to get into contact with us.

Get Grower Support

Why Choose Our Products?

• Proven Cultivation Experience
Owner-operated with 8+ years of hands-on cultivation experience and 5 years of producing substrates and grains at scale. Our hydration, pasteurization, and sterilization processes are fully dialed in to support clean colonization and consistent results.

• Full Replacement Guarantee
If a Brown Treasure product arrives with issues or fails to meet expectations, we’ll replace it — no hassle. We stand behind what we ship.

• Fast, Reliable Shipping
We maintain active inventory and ship orders quickly, with a strong focus on same- or next-business-day fulfillment whenever possible.

• Premium Manure Sourcing
We use locally sourced, nutrient-rich manure from grazing animals in Puerto Rico. Each batch goes through a rigorous grinding and sifting process to remove sticks, rocks, and excess plant material, resulting in a clean, fine, premium-quality manure suitable for consistent substrate performance.

• Grower Education & Support
Have questions or need help? The owner is available and approachable, offering guidance and support throughout your grow. Just reach out by email or Instagram DM.

Featured Products

1 4
View all

Official Merchandise

1 4
View all

Our organic substrates are versatile and ideal for various plant growth needs. While our products support a range of gardening and cultivation purposes, we strictly do not endorse or permit the use of our substrates for any illegal activities, including the cultivation of prohibited substances. We will not post any images to this site that may fall into this category. Our commitment lies in promoting responsible and legal use of our eco-friendly solutions for sustainable and lawful growing practices.