Why Post-Harvest Is the New Battleground for Cannabis Quality

Key takeaways

- *Traditional 60/60 drying* often creates environmental swings because
HVAC systems “chase” setpoints.
- *Water activity (aw)*, not just relative humidity, is the controllable
target for stability.
- *Vapor pressure stability* helps reduce over-drying, preserving
sellable weight and consistency across batches.
- *Trichomes are fragile*; fewer fluctuations supports terpene retention
and shelf appeal.
- *Scalable workflows* separate curing from long-term storage to protect
quality while increasing throughput.

Cultivators obsess over genetics, nutrients, and environmental controls
throughout the growing cycle. But for years, the industry treated
post-harvest processes as an afterthought, relying on inherited techniques
like the “60/60” drying method or advice passed down from mentors and
legacy growers. According to Cannatrol Executive Vice President of
Marketing Chris Mapson, that disconnect has cost growers more than they
realize.

“You can spend all the time you want growing amazing cannabis, but if you
don’t dry and cure correctly, you waste a lot of that effort,” he said.

*Cannatrol* focuses on bringing scientific rigor to one of the most fragile
stages of production. The company’s approach reframes drying, curing, and
storage not as an arcane art but as a controlled, repeatable process rooted
in vapor pressure control. A technology that has already proven effective
in food production for aging meat and cheese.
Why 60/60 struggles at commercial scale

In an attempt to control relative humidity, traditional drying rooms rely
on a constantly cycling system of air conditioning, humidifiers, and
dehumidifiers, resulting in environmental fluctuations. While the swings
may seem minor, they can have outsized effects on plant material at the
cellular level.

Instead of chasing relative humidity (RH), Cannatrol’s patented Vaportrol®
technology focuses on controlling water activity (aw) by stabilizing vapor
pressure inside the environment.
Beyond RH: stabilize vapor pressure to control water activity

“The use of traditional methods makes stabilizing the environment very
difficult,” Mapson said. “Traditional HVAC environmental controls are
constantly cycling on and off chasing setpoints. This causes fluctuations
in the environment and leads to overdrying whereas Vaportrol stabilizes the
internal environment.”

Cannatrol systems help prevent over-drying and unnecessary weight loss by
carefully managing the drying and curing process. This lets cultivators
keep more sellable product from each harvest. The result is a consistent
environment that minimizes stress on the plant material during drying,
curing, and storage. This is especially effective at commercial scale,
where variability can mean serious losses of product and profitability
across batches.
[image: Macro close-up of cannabis trichomes with bulbous heads on
transparent stalks against a dark background.]Trichomes can be stressed by
environmental swings—stability helps protect terpene-rich structures.
(Photo: Cannatrol)
Protecting trichomes means protecting terpenes

Environmental fluctuations matter, because trichomes are far more delicate
than many growers realize. In unstable environments, trichomes repeatedly
expand and contract as vapor pressure shifts.

“Think of a rubber band or balloon,” Mapson said. “The more you stretch it,
the more likely it is to break. It’s the same with traditional HVAC
environments in cannabis where vapor pressure is not controlled.
Controlling vapor pressure stabilizes [the environment in the space], so
the trichomes have the opportunity to form a cuticle for a hardened,
protective shell. Consequently, terpene loss is significantly reduced.”
What lab results suggest about damage and retention

Cannatrol’s Vaportrol-powered systems have been independently validated
through lab testing, and scientific review. Tests indicate the technology
results in up to 28 percent less trichome damage and on average 16 percent
higher terpene retention compared to traditional methods, he added.

The benefits go beyond preservation. Consistency becomes scalable, and for
operators supplying demanding wholesale or medical markets, repeatability
can be the difference between premium pricing and potential product
remediation.
Automation that reduces guesswork and labor

Cannatrol’s systems are designed to be low-maintenance, even while
delivering precise control. Burping jars are not required, and there’s no
need for constant environmental tinkering or guesswork. Operators can dial
in parameters and rely on the system to hold steady.

For commercial facilities, Cannatrol recommends separating curing and
long-term storage. This workflow allows facilities to scale without
overcrowding systems or compromising quality.
The science of success: bridging the post-harvest educational gap

Mapson is candid about the industry’s biggest hurdle: education. The
state-legal industry is still young, and much of its operational knowledge
has been inherited informally rather than built on data.

“We’ve been controlling vapor pressure for more than twenty years in other
industries,” he said. Cannatrol’s patented Vaportrol Technology was
invented by company co-founder David Sandelman and first gained wide
acceptance in the meat-aging and cheesemaking industries. “So, applying it
to cannabis isn’t about inventing something new. It’s about education. You
don’t know what you don’t know.”

That educational gap is especially pronounced in post-harvest processing,
where mistakes aren’t always immediately visible but quietly erode product
value over time.

For Mapson, the impact of Cannatrol became real during an early commercial
installation visit. He watched a grower grasp the science behind vapor
pressure control, then returned weeks later to see the results firsthand.

“I was newer to the company at the time, and I remember seeing that ‘aha’
moment in the grower — when education crossed the line into ‘he gets it,’”
he said. “I visited a few weeks later, and that was the only product he’d
consume now: something that came through the Cannatrol system.”
[image: Tall industrial racks hold large amounts of hanging cannabis in a
post-harvest drying area with fans and ventilation overhead.]At commercial
scale, small environmental fluctuations can compound into major variability
across batches. (Photo: Cannatrol)
The future of cultivation: standardizing quality in a regulated market

As conversations around federal rescheduling and medical normalization
continue, commercial cannabis is moving toward higher standards, tighter
controls, and greater accountability. Post-harvest processing is no longer
a place for improvisation.

For operators looking to protect margins, elevate quality, and deliver
consistency at scale, vapor pressure control represents a clear
evolutionary step. Once growers understand what’s happening at the
microscopic level, the decision becomes less about innovation and more
about inevitability.

*cannatrols.com*
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What growers are asking about water activity and vapor pressure control

1. What is water activity (aw), and why does it matter in curing?

Water activity describes how “available” water is in the flower for
reactions and microbial growth. Stabilizing aw helps preserve quality and
consistency.
2. Why isn’t relative humidity enough to control drying outcomes?

Relative humidity (RH) can look “correct” while the environment still
swings due to equipment cycling. Those swings can stress plant material and
contribute to overdrying.
3. What’s the problem with traditional 60/60 drying?

In many facilities, maintaining stable conditions is difficult because
HVAC, humidifiers, and dehumidifiers cycle on/off chasing setpoints, which
creates fluctuations.
4. How does vapor pressure relate to trichome integrity?

When vapor pressure shifts repeatedly, trichomes can expand/contract. A
more stable environment can reduce stress on these delicate structures.
5. Does post-harvest stability really affect terpene retention?

Stability can reduce avoidable loss during drying/curing by minimizing
stress and preserving aromatic compounds tied to trichome condition.
6. How do you scale curing without sacrificing consistency?

Many facilities separate curing from long-term storage so systems aren’t
overcrowded and parameters remain repeatable batch to batch.
7. Is post-harvest “automation” only for large operators?

Not necessarily. Repeatability and reduced labor/guesswork can benefit
smaller teams too, especially when consistency drives brand value.
8. What’s the biggest post-harvest mistake growers make?

Treating drying and curing like a feel-based craft instead of a
controlled process. Problems may not show up immediately but can erode
value over time.