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Start with the problem you need to solve.

One book for the worms. One for the business.

They answer different questions, and neither one is the advanced version of the other.

Grower Edition — $49

Run the worm system better

Start with Grower Edition if your questions sound like:


• How much should I feed?

• Is the bin too wet or too dry?

• Why are the worms trying to leave?

• When should I harvest?

• How do I manage temperature?

• What should I do with the castings?

• Should I use an extract?

• How do I keep the system healthy through seasonal changes?


Grower Edition is about the biology and day-to-day management of the worm system.

Pro Edition $169

Build the Business Around the Worm Farm

Start with Pro Edition if your questions sound like:


• What does this product really cost me to produce?

• What should I charge?

• Which products should I sell?

• Can my current production support more customers?

• Why does cash feel tight even when sales are coming in?

• When does it make sense to add equipment, space, or labor?

• How do I improve records, SOPs, customer development, and business systems?

• How do I make better decisions before committing money or capacity?


Pro Edition is about the business, financial, operational, and strategic decisions around the worm farm. It assumes you already know how to grow worms.

If You Need Both

Some growers will need both books.


You may already sell worms or castings but still have production problems.


You may be a strong grower who has never calculated true unit cost.


You may already have customers but no system for records, cash flow, or capacity.


Start with whichever problem is costing you more right now.

Not sure where you are yet?

If you're still figuring out whether you have enough production to build a business around, start here:


Four Numbers to Track Before You Add Another Worm Bin


• Food Input

• Harvest Interval

• Finished Output

• Worm Inventory After Harvest

Grower helps you run the worm system. Pro helps you run the business around it.

Grower Edition

Grower Edition — $49

Pro Edition

Pro Edition — $169