Little Leaf Farms’ Head Grower Shares Steps to Success
May 22, 2025 
In a recent CropTalk episode, Pieter Slaman, head grower for Little Leaf Farms (headquartered in Devens, Mass.), sat down with Adam Greenberg, CEO of IUNU, to talk about how one of the most successful greenhouse lettuce operations in North America was built and scaled.
Slaman walked through the systems, decisions, and culture that have driven Little Leaf’s growth. Here are a few key takeaways for growers, investors, and operators who are focused on building a sustainable and profitable CEA business.
Stop Overcomplicating the Crop Mix
Slaman made it clear that too many growers overextend themselves by adding new crop varieties. Some operations attempt to grow more than 15 types of lettuce under one roof. That level of complexity often introduces operational inefficiencies and strains systems in the facility. Rather than continuously adding to your crop offerings, he suggested, it’s better to build your infrastructure and team around a few, and execute on those at a high level. Simplicity supports scale.
The Plant Leads, Not the Sales Team
At Little Leaf, plant biology sets the pace. Production rhythm and climate management are driven by what the crop needs, not what the sales cycle demands. When sales or finance start dictating what the greenhouse should do, the crop suffers and so does profitability.
Seven Days a Week or Don’t Bother
A major turning point for Little Leaf was shifting from a five-day to a seven-day production rhythm. Immediately, crop quality improved, output stabilized, and Monday harvest inconsistencies disappeared. The business became more predictable and profitable almost overnight. The company tracks daily crop weights by variety, by row, and by greenhouse. Adjustments are made using real metrics, not guesswork.
100 Kilograms per Square Meter: The Floor for Viability
Slaman didn’t hedge on this point. If your greenhouse isn’t producing at least 100 kilograms per square meter, you’re not operating a financially sustainable lettuce business.
Create a Culture That Moves with You
Little Leaf doesn’t scale by hiring resumes. It develops people from within. Team members who started in shipping or packaging have worked their way into grower roles. Every new site carries culture with it, through people who understand it firsthand. The takeaway: Give your team something to grow into. When people see a path forward, they take more ownership in the outcome.
Innovate With Intention
Whether it’s lighting, automation, or infrastructure, Slaman is constantly evaluating what’s working and what’s not. But changes are only made when the return is clear. He’s walked away from vendors that couldn’t meet their evolving needs and redesigned systems that no longer served the crop. Innovation means constantly improving performance, and Slaman’s experience is that if something doesn’t serve yield or reduce costs, it’s not worth your time.
Walk the Greenhouse
Despite the data dashboards, business intelligence (BI) reports, and historical trendlines, Slaman emphasizes the importance of being physically present in the greenhouse. His growers walk their zones daily. They feel the pipes. They smell the air. They look the crop in the eye. Data is only as useful as the person interpreting it. Training growers to recognize environmental cues is just as critical as analytics.
Communicate and Hold Yourself Accountable
One of the more operationally insightful moments in the conversation came when Slaman described his commitment to clearing his inbox. Every email is addressed before the day ends. Not because it’s a productivity trick, but because it closes loops and creates clarity across the team. The message is that leadership requires responsiveness: if your communication is scattered, your execution will be too.
The Real Work Is Personal
Slaman shared the intensity of Little Leaf’s early years. Sixteen- to 18-hour days were the norm. Building the system, solving unknowns, training new teams—none of it came easy. At one point, burnout and health issues forced him to reassess how he was working and why. As the company scaled, he focused on building a leadership team that could take ownership and carry the load together. His experience not only changed how he leads, but it also reshaped his personal outlook. Faith, humility, and balance became just as important as SOPs and climate controls.
The Key to Scaling Successfully
Little Leaf Farms didn’t scale because of a secret technology or a breakthrough in funding. It scaled because of clarity. One crop. One culture. One clear operational standard. It optimizes relentlessly. It tests what matters. It trusts its growers. And it doesn’t lose sight of what a plant actually needs.
To learn more, listen to the full episode (ep. 261) of CropTalk featuring Pieter Slaman on CropTalkMedia.com, Spotify, or Apple Podcasts.