Dutch cress grower Koppert Cress has a CO₂ problem that looks a lot like everyone else's: the greenhouses that grow their arugula and microgreens need atmospheric carbon to feed photosynthesis and maximize yield, but getting it means buying it as a byproduct of natural gas combustion. That supply chain is expensive, volatile, and not compatible with any serious climate commitment. On April 10, 2025, Koppert Cress solved it by investing $25.1 million into Skytree, a direct air capture startup, and becoming the launch customer for Skytree's new greenhouse DAC systems. The funding closed Series A. The systems are entering mass production. And this is the moment controlled-environment agriculture stops being a theoretical use case for DAC and becomes its first industrial customer.

The innovation here is not that DAC exists or that greenhouses need CO₂. Both facts are old. What is new is the economics. Greenhouse horticulture globally consumes about 10 million metric tons of CO₂ per year, nearly all of it sourced from natural gas combustion, either onsite or from distributed suppliers. That dependency locks growers into fossil fuel price exposure and embeds emissions into their crop costs. Koppert Cress and its 280-member investment cooperative, Horticoop, which also backed the Series A, saw DAC not as a carbon removal play but as a supply chain solution. Why buy CO₂ from a gas plant when you can capture it from the air at the greenhouse location, at stable prices, with zero fossil fuel exposure? It is a reframing that turns DAC from a climate-tech problem into a horticulture input problem.

Skytree has built two units for the job. The Cumulus captures up to 30 kg of CO₂ per day; the Stratus produces up to 1,000 kg per day. Scanfil, a Finnish manufacturer, is handling production in the US and Europe. The Stratus will be deployed first at Koppert Cress' new greenhouse in Monster, South-Holland, and then in its existing operations. Deployment is already underway in the Netherlands, Canada, Australia, and New Zealand. The validation behind this is not theoretical. Wageningen University's Innovation and Demonstration Center for CO₂ from Outdoor Air ran a pilot with Skytree's Cumulus in a cucumber greenhouse. Over 166 days, the DAC unit produced yields of 71 kg/m², exactly matching OCAP, the industry's standard pipeline system for fossil-derived CO₂. That number matters. It proves that DAC can replace the supply without sacrificing crop performance, which is the only bar that matters to a commercial grower.

Why now is straightforward: fossil fuel costs are volatile, and renewable electricity is cheap enough to make DAC economics work at the scale where greenhouses operate. Koppert Cress is a 280-member cooperative of Dutch growers, one of the world's largest horticultural regions. Division Q, Koppert Cress' investment arm, explicitly framed this deal as part of their broader mission to be climate positive by 2026. That deadline forces capital deployment now. Skytree had demonstrated technical proof, secured manufacturing capacity, and landed a customer with the scale and commitment to validate the business model. The combination of regulatory pressure (EU emissions targets), customer demand (cooperatives of growers with stated climate commitments), and energy economics (renewables undercutting fossil fuels on marginal costs) created the opening.

Who wins is clear: growers with greenhouses in regions with cheap renewable electricity. Who loses is fossil fuel suppliers selling CO₂ to horticultural customers. The 10-million-metric-ton global greenhouse CO₂ market is not huge by energy standards, but it is entirely captive, greenhouses have no choice but to buy CO₂, and they currently have no way to produce it onsite without this technology. Koppert Cress also benefits from another asymmetry: as a seed investor and launch customer, they have a first-mover advantage in supply costs. Competitors in Australia, New Zealand, and Canada will pay more for the same equipment until Skytree's production scale brings prices down. For Skytree, this deal is a beachhead. One successful installation at scale in a cooperative of 280 growers creates reference architecture for the next 10,000 greenhouses globally.

Here is what is actually happening: DAC as a climate technology has been capital-constrained and commercially unproven for years. This deal does not solve the carbon removal problem at scale or make DAC cheaper than it was. What it does is move DAC from the climate-mitigation bucket into the agricultural-input bucket, where customers care about supply security and price stability, not carbon removal narratives. Koppert Cress is not buying Skytree systems because they are good for the atmosphere. They are buying them because capturing CO₂ onsite is more economical and more reliable than sourcing it from fossil fuel suppliers. That economic reality, not climate commitment alone, is what scales a technology. If Skytree's unit costs drop to under $200 per kg/day capacity, and manufacturing scale suggests they will, this becomes the default choice for new greenhouse construction in any region with renewable electricity. That is the actual story. Watch whether the Texas partnership with Return Carbon and EDF Renewables materializes at the claimed 500,000-tonne-per-year scale. If it does, Skytree will have proven the model works outside horticulture, which is when this stops being a Dutch agriculture story and becomes a global infrastructure story.

Three things will tell you if this plays out as intended: First, Koppert Cress completes the Monster facility deployment on schedule and publishes operational data on CO₂ capture efficiency and electricity costs over a full growing season, this data will become the reference for every other grower evaluating the system. Second, Horticoop members begin installing Skytree units at their own operations within the next 18 months; that is the real test of customer conviction beyond the lead investor. Third, the Texas facility begins operations and delivers renewable-powered DAC at under $150 per tonne of CO₂ captured. That last figure is the cost threshold that makes this economical for permanent sequestration as well as horticulture input supply, which is when the market size stops being 10 million metric tons of existing demand and becomes 10 million metric tons plus global emissions reduction targets.