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Introducing The Void Grows

Meet the open-source mushroom cultivation dome designed to make home mycology accessible, beautiful, and endlessly hackable.

The Void Grows··4 min read

A New Kind of Growing

What if growing fresh gourmet mushrooms at home was as simple as plugging in a lamp? That is the question that started The Void Grows -- and today, we are excited to share what we have been building.

The Void Grows is an open-source mushroom cultivation dome. It is precision-engineered, beautifully designed, and built from the ground up to be modified, improved, and shared by anyone. Whether you are a first-time grower curious about Lion's Mane or an experienced mycologist looking for a climate-controlled fruiting chamber, there is a Void for you.

Three Tiers, One Ecosystem

We designed three products to meet growers at every level:

Dark Dome -- The entry point. A passive humidity dome with no electronics, no wires, and no complexity. Drop in a substrate block, mist occasionally, and watch mushrooms emerge. Perfect for anyone who wants to try home cultivation without commitment.

The Void -- The sweet spot. An automated cultivation dome with built-in humidity control, a fresh air exchange fan, and ambient LED lighting. Set your species profile and the dome handles the rest. WiFi-connected so you can monitor conditions from your phone.

Void Core -- The full platform. Everything in The Void plus UV-C sterilization, a HEPA-filtered air intake, PID-tuned environmental controls, and an open firmware you can flash and modify. Built for serious growers and hardware tinkerers who want total control.

Every tier shares the same geodesic dome form factor. Every tier is open-source under CERN-OHL-P-2.0.

Why Mushrooms, Why Now

Mushroom cultivation at home is not just a hobby -- it is a step toward food sovereignty. Fresh gourmet mushrooms cost $12 to $20 per pound at grocery stores, and medicinal varieties like Lion's Mane and Reishi are even more expensive in supplement form. Growing your own changes the economics entirely.

Beyond cost, there is the quality factor. Store-bought mushrooms are often days old by the time they reach your kitchen. Home-grown mushrooms are harvested at peak freshness, with flavors and textures that commercial varieties simply cannot match.

And then there is the medicinal dimension. Lion's Mane has shown promising results for cognitive support and nerve regeneration. Reishi is one of the most studied medicinal mushrooms in the world. Turkey Tail is used as an adjunct therapy in oncology. Growing these species at home puts their benefits within reach of everyone, not just those who can afford premium supplements.

Open Source to the Core

Every part of The Void Grows is open-source. The 3D-printable dome panels. The PCB designs. The ESP32 firmware. The companion app. The build guides. All of it.

We chose the CERN Open Hardware Licence -- Permissive (v2.0) because we believe the best way to advance home cultivation technology is to let anyone build on it. Download the STL files and print your own dome. Fork the firmware and add a feature. Design a new sensor mount and share it back to the community.

This is not open-source as a marketing strategy. It is open-source as a design philosophy. The more people who build, modify, and improve this platform, the better it gets for everyone.

What is Coming Next

We are preparing for a Kickstarter launch in the coming months. The campaign will offer all three tiers at early-bird pricing, along with starter kits that include substrate blocks for your first grow.

In the meantime, here is what you can explore right now:

We are building something different here -- not just a product, but a platform for a growing community of home mycologists. Welcome to The Void.


The Void Grows is open-source hardware under CERN-OHL-P-2.0. All designs, firmware, and documentation are freely available.

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