Rule of 10s™  ·  Book Launch 2026

Grow Perfect 10

The Benchmark.

Before GP-10, cultivation was art: intuition, personality, tribal knowledge. GP-10 makes it science. The Rule of 10s™ is the industry's first complete and predictive CEA facility and operations benchmark with measurable inputs, predictable yield outcomes, built from 40+ years and 100+ facility turnarounds.

"The machine has to run. Regardless."

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Single Operation: Book Benchmark Assessment MSO Portfolio: Book Portfolio Diagnostic
JR Loza Vince Harkiewicz
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40+ Years Combined in CEA
100+ Facilities Turned Around
10 Rules. No Exceptions.
1st Benchmark of Its Kind
The Benchmark

Scale expertise.
Not headcount.

The Rule of 10s™ is not just intake and opinion. It is the first benchmark of its kind, a standardized management and optimization framework that predicts yield and quality outcomes measured through the R-Score™.

🔬

Systems Over Personalities

Stop depending on your "best grower." Build operations that perform consistently, regardless of who's on shift.

🏭

Facility Intelligence

From design and equipment to water chemistry and fertigation, the Big 4 rules form an interlocking foundation everything else rests on.

📐

Transferable Across Facilities

Built to work in any commercial cultivation environment: cannabis, CEA, vertical farms. Substrate-agnostic. Operator-hardened.

🎯

The R-Score™: Measure & Predict

The Benchmark's unified score. Not just diagnostic, predictive. Gauge where your cultivation stands today. Forecast where it's headed.

"
Most facilities don't fail because of a bad crop. They fail because they built the operation around people instead of processes.

JR Loza, Author of GP-10 & Grow Perfect 10 Chief Cultivation Officer
with Vince Harkiewicz, Co-Author & Grownetics CEO

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The Framework

The 10 Rules

Each rule is a pillar of The Benchmark. Miss one, and the structure cracks, and your R-Score will show it. The first four form the foundation. Everything builds from there.

★ First Among Equals
Rule 01
Ego & The Human Element

Before you fix the water, the lights, or the nutrients, you fix the people dynamic. Ego is the silent killer of more grows than any pathogen. The machine has to run regardless of who's in the room.

🧠
Rule 02
Facility Design & Equipment

Your layout is a decision you live with for years. Get it wrong and every other rule fights uphill.

Rule 03
Water Treatment & Fertigation

Water is the medium for every input. Control the water, control the crop. No exceptions.

Rule 04
Medium & Nutrients

The Big 4 close here. Your substrate choices and nutrient programs are engineering decisions, not brand decisions.

Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch
Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch
Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch
Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch
Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch
Locked
Additional benchmark rules are revealed at launch.
Revealed at Launch

The full framework drops with the book. Founding Members get it first.

Claim Your Founding Spot
The R-Score™

Not diagnostic.
Predictive.

Every other tool tells you what went wrong. The R-Score tells you what's coming before it happens. Powered by the Rule of 10s™, it's the only cultivation benchmark that's actually predictive of yield outcomes. Track all 10 scorecards. Watch the number move. Know exactly where your operation is headed.

Progress = Perfection
01
Study the Guides
02
Track Your 10 Scorecards
03
Implement Improvement Plan
04
Reassess & Score Again
0 5 10
7.2
R-Score

A sample R-Score. Yours is calculated from all 10 scorecards, one number that tells the whole story.

How The Benchmark Works

1
Tailor the Benchmark
Calibrate the benchmark framework to your operation, constraints, and goals.
2
Score with R-Score™
Pinpoint exactly what's limiting performance and establish a predictive baseline.
3
Build Improvement Plan
Prioritize changes by impact, sequence, and implementation feasibility.
4
Implement the Plan
Execute with accountability so standards become repeatable operating rhythm.
5
Ongoing Support & Check-Ins
Maintain momentum with recurring reviews, coaching, and benchmark progression.
Rule 01: Ego & The Human Element
"The machine has to run regardless."

One day, while discussing my transition from working for one of my mentors, someone who's built over 30 successful businesses, I learned one of the most valuable lessons of my career.

"Look J.R., I don't want to lose you. I'm a big fan of you. But if you have to go, my machine, my business can't stop. Anything can happen to you. You can die. You can move. You can get sick. So, my machine has to run regardless."

JR's mentor, builder of 30+ successful businesses

That's Rule 01 in one sentence. The machine has to run regardless. In CEA and indoor agriculture, this principle becomes even more critical. Plants don't take days off. They don't stop growing because your master grower called in sick.

⚠ The Cost of Hero Dependency
$300,000
The Hero Tax

I've walked into dozens of facilities and witnessed the same expensive mistake. A company hires a "Master Grower" for $80–150k annually. That grower implements their personal methods. The entire operation becomes dependent on their presence.


Within 12–18 months, they leave. The replacement scraps everything. I've seen this cycle repeat six or seven times at a single facility, totaling $300,000–$500,000 in lost production.

$80–150k Master Grower Salary
12–18mo Before They Leave
6–7× Repeat Cycle
$500k+ Total Lost Production

The cannabis industry needs to learn what manufacturing figured out decades ago: consistent quality comes from consistent processes, not exceptional individuals. GP-10 is that benchmark, and it makes cultivation outcomes predictable for the first time.

Field workers with no prior cultivation experience were running a master nursery within three weeks because they followed the system.

Read First

Read
Chapter One.

Go deeper on Rule 01 - the full chapter on Ego & The Human Element. Why the $300,000 Hero Tax bankrupts facilities, why systems beat rockstars, and how to build operations that run without you.

Full Chapter
Rule 01: Ego & The Human Element
GP-10: Grow Perfect 10  ·  JR Loza & Vince Harkiewicz

Why do facilities with excellent growers still underperform? Why doesn't expertise transfer? Rule 01 answers both - with the $300K Hero Tax, the Three-Person Test, and a self-assessment to score your operation.

Read Chapter 1
The Builders

Built by people who've
done the work.

GP-10 systematizes what top consultants and growers do into a standardized management and optimization framework for cultivation teams, operations leaders, and ownership.

JR
JR Loza
Author of GP-10 & Grow Perfect 10 Chief Cultivation Officer

JR is a cup-winning cultivator who has led 115+ grow audits and consulted on projects from California to New York over 29+ years in commercial cultivation. He specializes in precision crop steering, LED lighting strategy, and fully integrated system workflows that help teams hit 2.5–4+ lbs per light while staying lean and profitable. After seeing the same ten failure modes repeat themselves over and over again, he spent twelve years refining what became The Rule of 10s™ - his life’s work distilled into the first predictive benchmark for CEA operations.

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Cultivation Design Facility Turnarounds CEA Operations SOPs & Training
VH
Vince Harkiewicz
Co-Author & Grownetics CEO

Vince is a longtime cultivator and leads Grownetics in developing open-source crop analytics, high-resolution sensor platforms, and high-precision, high-efficiency cultivation systems. Grownetics customers regularly operate with 30–50% less staff than their competition while producing the highest quality and yield. He'd spent years building data models that were indicative of outcomes but never complete. Working with JR made one thing clear: The Rule of 10s™ is the first model comprehensive enough to be predictive, and that's what makes it revolutionary.

Data Systems Lean Manufacturing CEA Technology Benchmarking