agriculture · energy · family: the solution exists but nobody can afford it
the energycost per lettuce
Energy cost barrier in indoor vertical farming
Problem statement
Indoor vertical farming carries an energy cost that field agriculture does not, because artificial lighting has to stand in for sunlight; skeptics quoted by Fortune call that lighting energy-intensive and say paying for it can make profitability impossible, and Grist reports that roughly 75 percent of the industry's costs stem from labor and energy. Critics quoted by CoStar point to the mismatch between those high costs and the low-margin goods — lettuce, microgreens, leafy greens — that these farms produce. Between 2022 and 2025, high costs — energy, labor and construction among them, alongside a capital-intensive model and a funding market that dried up — preceded the bankruptcy or shutdown of AeroFarms ($238M raised; Chapter 11 in June 2023), AppHarvest (almost $800M secured across 12 rounds; Chapter 11 in July 2023), Bowery Farming (more than $700M raised; ceased operations November 2024), Plenty (nearly $1B raised; Chapter 11 in March 2025), Fifth Season (shut down in 2022), Infarm (closed its European operations and had its Dutch arm declared bankrupt in 2023), and others — a wave of failures that took down the sector's most heavily capitalized companies within a three-year span. The underlying disadvantage hasn't changed: as Grist puts it, traditional agriculture takes advantage of natural conditions, while controlled-environment agriculture has to produce those conditions artificially and power them with electricity — what the plant scientist Bruce Bugbee, quoted by Grist, calls "the fundamental physics challenge of turning fossil fuel energy into food."
Why this matters
The case for growing indoors, as the coverage states it, is that crops can be sheltered from increasingly extreme weather, grown with less water and land, and grown closer to the people who eat them. Companies promise year-round production, far less water (AeroFarms claims up to 95% less), no pesticides, and proximity to consumers. Market forecasts in the coverage vary widely: Grist cites a prediction that the U.S. controlled-environment agriculture market would be worth $3 billion by 2024, while Food Dive cites a 2022 PitchBook analysis projecting the segment at $155.6 billion by 2026. But an agricultural lender quoted by Fortune is not convinced indoor farming can work at all, except perhaps where a big retailer teams up with a grower, as Walmart did with Plenty, or where grants support urban and vertical farms that benefit communities. For indoor growing to deliver on that climate case, the energy cost would have to come down first.
What’s been tried and why it hasn’t worked
Vertical farms often grow under artificial light, and paying for that light is the cost that field crops avoid. AeroFarms invested heavily in proprietary aeroponic technology and a new Danville, Virginia farm, but its attempts to raise enough capital to keep operating fell short — it filed for Chapter 11 in June 2023 and emerged in September 2023 after deciding to focus exclusively on ramping up the Danville farm and to eliminate spending on all other projects. AppHarvest built large high-tech greenhouses in Kentucky rather than vertical farms, but lower-than-expected crop yields, tomato brown rugose fruit virus, and elevated operational costs weighed on it, and it filed for Chapter 11 in July 2023. Greenhouse growers are presented in the coverage as the more patient players: Fortune reports that Eden Green says it has found a way to rely mostly on natural light, and a VerticalFarmDaily piece written from Eden Green's own perspective credits the flat-tray greenhouse growers Little Leaf Farms and Gotham Greens with taking a long-term approach to growth — though Fortune adds that this is only if the concept works. Others shifted to higher-margin products (microgreens, mushrooms, salad kits), but VerticalFarmDaily notes the pivot requires spending on additional equipment and processes, and time to redirect sales and merchandising, in an environment where burn rates have to come down; Plenty's restructuring keeps a strawberry farm in Virginia and a plant-science research center in Wyoming running. Some companies are trying to push energy costs down by relying on solar; the plant physiologist Fortune quotes thinks there are better ways to provide food locally and extend the growing season outdoors, such as high tunnels, and that the investment would be better spent on practical solutions for outdoor farmers.
What would unlock progress
The core breakthrough needed is either: (1) a dramatic improvement in the efficiency of converting electricity to plant-usable photons; (2) biological approaches that reduce the amount of light plants need, such as engineered crops with enhanced photosynthetic efficiency or light-harvesting modifications; (3) passive or low-energy light delivery systems that capture and redirect natural sunlight deep into indoor growing structures (fiber-optic daylighting, luminescent solar concentrators, light pipes); or (4) radical reduction in lighting duration through circadian optimization or pulsed-light growing protocols that achieve equivalent biomass with less total energy input. Adjacent fields: semiconductor photonics (LED efficiency), synthetic biology (photosynthesis optimization), solar concentrator design (light capture and delivery).
Entry points for student teams
A student team could: (1) prototype a fiber-optic or light-pipe daylighting system that delivers sunlight to an interior growing shelf and measure the yield-per-energy-input compared to LED-only growing; (2) conduct a systematic comparison of pulsed-light growing protocols (varying pulse frequency, duration, and intensity) against continuous lighting for a standard crop like lettuce, quantifying energy savings vs. yield impact; (3) design and model a hybrid growing system that optimizes the tradeoff between natural light penetration and stacking density in a vertical structure, identifying the energy-break-even geometry. Relevant disciplines include agricultural engineering, optics/photonics, mechanical engineering, plant biology, and energy systems.
Genes
Structural cousins: stuck the same way, in other fields
Sources
"As indoor farming startups with hundreds of millions in funding head to bankruptcy, critic says: 'Boy, this is a dumb idea'," Fortune, September 18, 2023. (accessed 2026-08-20); "Lessons from vertical farming bankruptcies, layoffs, and closures in 2023," VerticalFarmDaily, 2023. (accessed 2026-08-20); "AeroFarms' Bankruptcy Filing Illustrates Trials of Vertical Farming Industry," CoStar, 2023. (accessed 2026-08-20); "AeroFarms files for Chapter 11 bankruptcy protection," Food Dive, June 2023. (accessed 2026-08-20); "AppHarvest promised Kentucky green jobs. It delivered 'hell on earth.'," Grist, 2023. (accessed 2026-08-20); "Vertical farming company Plenty files for bankruptcy after raising nearly $1B," TechCrunch, March 24, 2025. (accessed 2026-08-20); "Bowery Farming is ceasing operations," TechCrunch, November 4, 2024. (accessed 2026-08-20). go to source 1 ↗ go to source 2 ↗ go to source 3 ↗ go to source 4 ↗ go to source 5 ↗ go to source 6 ↗ go to source 7 ↗
Working notes
Notes made while writing and checking this brief, shown as written. They use working shorthand.
- The scale of capital destroyed is remarkable: AeroFarms ($238M per Crunchbase; TechCrunch says more than $300M), AppHarvest (almost $800M), Plenty (~$1B), Bowery (more than $700M), Infarm ($604M), and others — collectively over $3 billion invested in companies that went bankrupt or shut down.
- Some vertical farms are emerging from bankruptcy by dramatically narrowing their crop focus and market (AeroFarms emerged focusing exclusively on ramping up its Danville farm, which grows microgreens). This validates the market demand while confirming the economics remain tight.
- Related to existing briefs on sensor deployment in agriculture (`agriculture-realtime-soil-organic-matter-sensing`, `agriculture-soil-moisture-precision-irrigation`) — indoor farming bypasses some field-sensing challenges but introduces the energy constraint as the dominant barrier.
- Agriculture Dive, reporting AeroFarms' exit from bankruptcy in 2023, describes the sector's headwinds as conservative venture funding and exorbitant electricity costs; AgFunderNews reports that Infarm, announcing layoffs of more than half its workforce in November 2022, told employees that energy prices had doubled across Europe.
- Grist contrasts the Netherlands, where indoor farmers have learned best practices over half a century of trial and error, with American startups that have overwhelmingly failed to turn a profit or even break even; a former Fifth Season executive quoted by CoStar says the company's Silicon Valley tech investors had expectations of how fast things would come out, and VerticalFarmDaily calls the work a marathon, not a sprint. This suggests the problem may be partly `constraint:economic` (capital structure) rather than purely technical, but the energy cost is real regardless of financing model.
Reconciliation 2026-08-20: Three fixes from the citation-drift sweep. (1) The Fortune citation carried a bracket-reconstructed title ("Indoor farming startups with hundreds of millions file [for bankruptcy]"); replaced with the real headline, "As indoor farming startups with hundreds of millions in funding head to bankruptcy, critic says: 'Boy, this is a dumb idea'" (Fortune, Sept 18, 2023), verified at the URL now in the Source line. (2) The claim that "approximately 40% of all CEA startups from 2018–2022 failed" could not be sourced anywhere and was removed from the Problem Statement. (3) Per-company facts re-verified against direct coverage now added to the Source line: AeroFarms $238M raised and June 2023 Chapter 11 (Food Dive); AppHarvest "almost $800 million" secured across 12 rounds before its July 2023 bankruptcy (Grist investigation) — replacing the unsourced "$700M+"; Plenty nearly $1B raised, Chapter 11 March 2025 (TechCrunch); Bowery more than $700M raised and ceased operations November 2024 (TechCrunch) — the "$647M" figure in the note above reflects an equity-only tally and TechCrunch's higher total is the one now used in the body; Fifth Season shut down October 2022, so the body's failure window was corrected from "2023–2025" to "2022–2025". The unverified "energy comprised 25–30% of operating costs" (AeroFarms) and "rising energy prices in 2022 destroyed margins" (AppHarvest) were replaced with what bankruptcy coverage supports (AeroFarms' post-Chapter-11 narrowing to Danville per Agriculture Dive/Food Dive; AppHarvest's low yields, tomato brown rugose fruit virus, and elevated operational costs per Agriculture Dive). Infarm's 2023 European insolvencies verified via AgFunderNews/Sifted coverage; its exact funding total varies by tracker ($500M+ per Sifted; $604.5M per AgFunderNews), so treat the $604M figure above as approximate.
Reconciliation 2026-09-30: Fact repair after reading the whole write-up against every source it names, with a second reader going over the repairs the same day. Fetched on 2026-09-30 and read in full: the Fortune/AP piece (https://fortune.com/2023/09/18/indoor-farming-startups-bankruptcy-dumb-idea-expensive/); the VerticalFarmDaily piece (published 14 June 2023, written from Eden Green's perspective); the Food Dive piece (published 12 June 2023); the Grist investigation (published 16 November 2023; its page title matches the Source line, while the headline shown on the page reads "A celebrated startup promised Kentuckians green jobs. It gave them a 'grueling hell on earth.'"); and both TechCrunch pieces. The CoStar page returns 403 to scripts and was read in full from the Internet Archive copy (web.archive.org/web/2id_/www.costar.com/article/1859958548/aerofarms-bankruptcy-filing-illustrates-trials-of-vertical-farming-industry; the article is dated 9 June 2023). The Agriculture Dive pieces named in the 2026-08-20 note were located and read in full (https://www.agriculturedive.com/news/appharvest-bankruptcy-indoor-farming-martha-stewart-jd-vance/689039/, 26 July 2023, and https://www.agriculturedive.com/news/aerofarms-emerges-from-bankruptcy-fully-funded-and-with-a-new-ceo/694103/, 19 September 2023). The AgFunderNews pieces named in that note were located through the site's own search and read in full (https://agfundernews.com/infarm-to-lay-off-more-than-half-of-its-workforce, 29 November 2022, and https://agfundernews.com/infarm-declared-bankrupt-rumored-to-have-raised-50m-from-middle-east-say-industry-source, 28 September 2023); the Sifted piece could not be found. (1) Display title changed from "Ten Times the Energy per Lettuce" to "The Energy Cost per Lettuce": no source gives a multiple. (2) The opening sentence said indoor farming uses 10–30x more energy per unit of food than field agriculture, and that lighting is a "profoundly inefficient substitute" for sunlight; no source gives a multiple or an efficiency figure. It now says what the sources say: skeptics quoted by Fortune call the artificial light energy-intensive and say paying for it can make profitability impossible, and Grist reports that roughly 75 percent of the industry's costs stem from labor and energy. (3) "Unable to compete ... on all but the highest-margin crops (specialty greens, herbs)" is in no source; the sentence now gives the point CoStar's critics make, that the high costs go into low-margin goods such as lettuce and microgreens. (4) "This economic reality drove the bankruptcy" made energy the sole cause. CoStar quotes an industry executive saying energy, labor and construction costs were too high, and AeroFarms' own affidavit blaming a capital-intensive business and a failed fundraise; VerticalFarmDaily blames easy money, weak business models and unit economics. The sentence now lists those. (5) Fifth Season's shutdown month, October 2022, is in no source; Grist (November 2023) says it closed "a year ago" and CoStar (June 2023) says it shut down. The text now says 2022. (6) Infarm: AgFunderNews (28 September 2023) says the Dutch arm was declared bankrupt and that the company had closed its operations in Denmark, the UK, France, the Netherlands and Germany earlier that year; the parenthetical now says that instead of "European insolvencies". (7) The physics sentence (electricity to photons to growth, multiple efficiency losses) is in no source; it now paraphrases Grist's point that traditional agriculture uses natural conditions while controlled-environment agriculture must produce them and power them with electricity, and quotes the plant scientist Bruce Bugbee, from Grist, calling it "the fundamental physics challenge of turning fossil fuel energy into food". (8) Removed from Why This Matters because no source contains them: food production rising 50% by 2050, 9.7 billion people, a $5.6 billion market in 2023 and $13 billion by 2028, "premium products in wealthy markets" and "food-insecure regions". The paragraph now gives the case as Fortune states it (shelter from extreme weather, less water and land, closer to consumers), attributes the 95% water figure to AeroFarms (CoStar quotes its CFO saying "up to 95% less water and zero pesticides"), gives the two forecasts the sources do contain ($3 billion by 2024 for the U.S. CEA market, Grist; a 2022 PitchBook projection of $155.6 billion by 2026, Food Dive), and closes with the Fortune lender's view of where indoor farming might work. (9) Removed from What's Been Tried because no source contains them: red-and-blue LED tuning, the 2–3% wall-plug-to-biomass efficiency, and "proprietary LED systems" (CoStar says proprietary aeroponic technology). (10) "Emerged only after narrowing its focus to a single Danville facility": Agriculture Dive says AeroFarms will focus exclusively on the Danville ramp-up and eliminate spending on all other projects, and TechCrunch says it exited bankruptcy in September 2023; the sentence now says that, and gives CoStar's reason for the filing (attempts to raise sufficient capital fell short). (11) AppHarvest "conventional greenhouse designs with supplemental lighting ... (cheaper energy, more sunlight)" is in no source; Grist describes one of the world's largest high-tech greenhouses on more than 60 acres, and says nearly 70 percent of Kentucky's grid is coal-fired and the power would be prohibitively expensive. The sentence now says large high-tech greenhouses rather than vertical farms. Lower-than-expected crop yields, tomato brown rugose fruit virus and elevated operational costs are confirmed in Agriculture Dive. (12) The claim that hybrid greenhouse-plus-LED approaches failed because glass plus lighting cost more than they saved is in no source; the sentence now reports what the coverage does say: Fortune has Eden Green saying it relies mostly on natural light, with the caveat "that's if the concept works", and VerticalFarmDaily, written from Eden Green's perspective, credits Little Leaf Farms and Gotham Greens with a long-term approach to growth. (13) "Saffron" is in no source; VerticalFarmDaily names microgreens, mushrooms and salad kits as the higher-margin pivots and says the pivot needs additional equipment, processes and time while burn rates fall; the "limits the market to luxury segments" clause is gone, and TechCrunch's note that Plenty keeps a strawberry farm in Virginia and a research center in Wyoming running is added. (14) The solar "irony" sentence is in no source; Fortune says some companies are relying on solar to push costs down and that the plant physiologist it quotes thinks there are better ways to provide food locally outdoors, such as high tunnels, and that the money would be better spent on outdoor farmers. The sentence now says that. (15) The LED efficiency figures in What Would Unlock Progress (50–60% to PAR, 70–80% ceiling) are in no source and were removed; the unlock itself stays. (16) In the first Source Note, AppHarvest $700M became almost $800M (Grist) and Bowery $647M became more than $700M (TechCrunch), AeroFarms now carries both figures the sources give ($238M per Crunchbase in Food Dive and CoStar; more than $300M per TechCrunch), Infarm's $604M is confirmed in AgFunderNews ($604.5 million, 29 November 2022), and "couldn't solve the energy-cost problem" became "went bankrupt or shut down"; "relaunched focusing only on leafy greens in one facility" became "emerged focusing exclusively on ramping up its Danville farm, which grows microgreens" per Agriculture Dive. (17) The note on rising electricity prices and competing demand from data centers: data centers are in no source; the note now gives Agriculture Dive's description of the sector's headwinds (conservative venture funding and exorbitant electricity costs) and AgFunderNews's report that Infarm told employees energy prices had doubled across Europe when it announced layoffs in November 2022. (18) The note on Netherlands greenhouses, a 10-year ROI horizon and a 3–5 year VC horizon: the horizons are in no source; the note now gives Grist's contrast between the Netherlands, where indoor farmers learned best practices over half a century of trial and error, and American startups that have overwhelmingly failed to turn a profit, the CoStar quotation from a former Fifth Season executive about investors' speed expectations, and VerticalFarmDaily's "marathon, not a sprint". Confirmed in the sources and left as written: the Fortune headline, date and the quotation "Boy, this is a dumb idea" (Tom Kimmerer, on high energy costs); every other title and date on the Source line; AeroFarms $238M and its June 2023 Chapter 11 filing (CoStar, dated 9 June 2023, says it filed that Thursday); AppHarvest almost $800 million after 12 rounds and its Chapter 11 filing on 23 July 2023 (Grist); Bowery more than $700 million and the November 2024 shutdown (TechCrunch); Plenty nearly $1 billion and its March 2025 filing with debtor-in-possession financing (TechCrunch); the sector's most heavily capitalized companies failing (Plenty valued at $2.3B per VerticalFarmDaily; Bowery at more than $2B per TechCrunch); and the entry points, which are proposals rather than claims. Could not be checked: the Sifted coverage of Infarm named in the 2026-08-20 note. Genome tags untouched.