Rule of 10s Book

The cultivation benchmark
is coming.

Commercial cultivation has been missing a shared standard. Rule of 10s gives cultivators, owners, and investors a common language for diagnosing performance, prioritizing improvements, and building operations that can scale.

Publishing 2026
Rule of 10s book cover
10
Critical Domains
115+
Facility Audits Behind the Framework
01
Chapter Available Now
Q2
Launch Window

The industry does not need another grower opinion.
It needs a benchmark.

Most teams know something is limiting performance, but they lack a repeatable way to prove where the constraint lives. The Rule of 10s turns cultivation expertise into a structured evaluation that owners, operators, consultants, lenders, and investors can understand.

The Promise
Measure
before
you improve.
A practical language for seeing where cultivation value is created, limited, or lost.

Start with The Big 4.

The public preview introduces the foundation of the GP-10 framework. These first four domains have outsized influence on every other part of the operation.

01
Ego & The Human Element
The operation cannot depend on one irreplaceable person. The machine has to run regardless.
People
02
Facility Design & Equipment Selection
Infrastructure decisions must serve the operation, not personal preference or vendor pressure.
Systems
03
Water Treatment & Fertigation
Inputs, delivery, and verification have to be measurable before they can be optimized.
Inputs
04
Medium & Nutrient Program
The production system needs a repeatable foundation that supports the intended crop strategy.
Foundation

Built from turnarounds, systems, and real facility data.

Creator of the Rule of 10s

JR Loza

Founder of Grow Perfect 10. JR is a commercial cultivation turnaround specialist with 27 years in the industry and more than 115 facility audits.

Co-author

Vince Harkiewicz

CEO of Grownetics. Vince has helped design and develop state-of-the-art crop analytics and high-efficiency automation systems for commercial CEA.

Get notified when the book is available to order.

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FAQ

A few quick answers.

When will the book be available?

Ordering details are coming soon. The waitlist is the best place to get the first notification.

Who is the book for?

Commercial cultivators, owners, MSO leaders, consultants, vendors, lenders, and investors who need a clearer way to evaluate operational performance.

Is this only for cannabis?

The book is rooted in commercial cannabis and controlled environment agriculture, with principles that apply anywhere precision cultivation needs repeatable operating standards.

Can I read a sample?

Yes. Chapter 1 is available now as a free preview.