Flow Hive: An Honest Assessment for Beekeepers
The Flow Hive is one of the most polarizing products in beekeeping. Since its record-breaking Kickstarter campaign in 2015, it has drawn both passionate enthusiasm and sharp skepticism -- often from people who have never used one. The marketing makes extraordinary claims. The critics make extraordinary counterclaims. The truth, as usual, lives somewhere in the middle.
This guide is not a sales pitch and it is not a hit piece. It is a careful, evidence-based look at what the Flow Hive actually is, how its patented frame technology works, what it genuinely does well, where it falls short, and who it is realistically suited for. If you are considering buying one, or if you are just curious about the technology, you will find specific numbers, honest trade-offs, and practical guidance here.
One thing should be said up front: the Flow Hive does not change beekeeping itself. Your bees still swarm, your mites still multiply, your queen still needs monitoring, and your colony still needs winter preparation. What the Flow Hive changes is one specific task -- honey extraction -- and it does that particular job remarkably well for a certain type of beekeeper.
What Is the Flow Hive?
The Flow Hive is a modified Langstroth beehive that uses specially engineered plastic frames, called Flow frames, in the honey supers. It was invented by father-and-son team Cedar Anderson and Stuart Anderson in Byron Bay, Australia, and introduced to the world through a 2015 Indiegogo campaign that raised over $12.2 million -- making it the most funded campaign in the platform's history at the time.
The core innovation is the Flow frame itself. Unlike a standard Langstroth frame, where bees build comb onto wax or plastic foundation and honey is extracted by cutting the cappings off and spinning the frames in a centrifugal extractor, the Flow frame contains pre-formed cells made from food-grade polypropylene that are split vertically into two halves. When the bees fill and cap the cells with honey, the beekeeper inserts a key and turns it, which shifts the cell halves apart, creating vertical channels through which the honey drains out through a tube and into a jar. No opening the hive. No removing frames. No extractor required.
The brood chamber -- where the queen lays eggs and the colony raises new bees -- uses standard Langstroth frames and foundation, exactly like any conventional hive. The Flow technology applies only to the honey supers above the queen excluder. This distinction is critical: the Flow Hive is not an entirely different hive system like a top bar hive or a Warre hive. It is a Langstroth hive with a modified honey super.
Since the original Flow Hive Classic, the company has released several iterations including the Flow Hive 2 (with a built-in observation window and improved drainage), the Flow Hive 2+ (with an adjustable entrance and ant guard), and the Flow Hive Classic (a more affordable version of the original). As of 2026, complete Flow Hive kits range from approximately $600 to $930 USD depending on the model and configuration.
How It Works
The Flow Frame Mechanism
Each Flow frame contains hundreds of partially formed hexagonal cells molded from BPA-free, food-grade polypropylene. The cells are split vertically into two offset halves -- think of a honeycomb cell cut in half lengthwise, with each half slightly offset from the other.
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Bees fill the cells. The bees treat the plastic cells like any other comb. They draw them out with a thin layer of wax, fill them with nectar, fan the moisture out until the moisture content drops below 18.6%, and then seal each cell with a wax capping. This is the same process they use in standard frames.
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The beekeeper inserts the key. When the honey is ripe and capped, the beekeeper inserts the Flow Key into the top of the frame. The key engages a gear mechanism that runs the full width of the frame.
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The cells split apart. Turning the key shifts the two halves of each cell apart by about 3 mm, creating a continuous vertical channel from the top of the frame to the bottom. The wax cappings crack and fold inward.
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Honey drains out. Gravity pulls the honey down through the open channels to a collection trough at the base of the frame, then out through a tube that passes through the front of the hive and into a waiting jar.
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The key is returned. Once the frame has drained (typically 20 minutes to 2 hours depending on viscosity and temperature), the beekeeper turns the key back to its original position. The cell halves realign, and the bees clean up the residual honey and repair the wax cappings within a few days.
What the Bees Actually Do
From the bees' perspective, very little changes about their work. They still forage for nectar, they still evaporate moisture, and they still cap cells when the honey is ready. The key difference is that they are building comb on a plastic substrate rather than on beeswax or wax-coated plastic foundation.
Bees generally accept Flow frames well, though initial acceptance can be slower than wax foundation. Beekeepers commonly spray the plastic frames with a light coat of sugar syrup or rub them with beeswax to encourage the colony to begin working on them. Once the bees have drawn out and filled the first set of cells, they typically work subsequent frames without hesitation.
💡 Tip: Place a Flow frame between two fully drawn and capped standard frames in the honey super. The bees will work outward from the familiar comb and accept the Flow frame faster than if it is placed at the edge of the box.
Extraction in Practice
To harvest from a Flow Hive:
- Check that the frames are at least 80% capped by looking through the rear observation window (Flow Hive 2 and later models) or by briefly opening the honey super.
- Place a jar or collection vessel under the drainage tube on the front of the hive.
- Insert the Flow Key into the frame slot and turn it slowly.
- Wait for honey to drain. Thicker honey (higher glucose, like canola or buckwheat) drains more slowly than thinner honey (higher fructose, like tulip poplar or sage).
- Turn the key back to reset the frame.
- Replace the full jar, label, and store your honey.
No smoker, no hive tool, no extractor, no uncapping knife, no straining (the Flow frame acts as a coarse filter), and no heavy lifting. For one to six frames, this process is genuinely faster and simpler than conventional extraction.
What the Flow Hive Does Well
Easy Honey Extraction
This is the Flow Hive's primary achievement, and it delivers on its promise. Conventional honey extraction requires an extractor ($200-$800 for a hand-crank model), an uncapping knife or fork, a straining setup, a honey bucket with a gate, and 2-4 hours of physical work for a typical hobbyist harvest. The Flow Hive reduces this to inserting a key and waiting. For beekeepers with 1-2 hives, this is a genuine quality-of-life improvement.
Reduced Disturbance to Bees
Standard extraction involves opening the hive, removing the queen excluder, pulling each frame, brushing or shaking bees off, transporting frames to an extraction site, uncapping, spinning, and returning frames. This process exposes the brood nest, disrupts the colony's climate control, and often results in crushed bees during frame replacement. The Flow Hive eliminates most of this disturbance for honey harvests specifically. You are still opening the hive for inspections, but harvest day is a non-event for the colony.
Beginner-Friendly Harvest Experience
For new beekeepers, the first honey harvest is often intimidating. The equipment is unfamiliar, the bees are defensive, and the process feels chaotic. The Flow Hive removes that barrier entirely. Watching honey flow from a tube into a jar is satisfying, accessible, and safe. This has real educational value -- it gets people excited about beekeeping who might otherwise quit after one messy conventional extraction.
Clean Honey
Because the honey drains through the Flow frame's internal channels and never contacts air until it reaches the jar, Flow Hive honey tends to be remarkably clean. There is no wax debris to strain out, no propolis contamination from handling, and no exposure to airborne particles during extraction. The honey goes directly from comb to container.
Educational and Engagement Value
The Flow Hive's observation window (standard on Flow Hive 2 and later) allows beekeepers to watch bees working on the Flow frames without opening the hive. For families, schools, and demonstration apiaries, this is genuinely valuable. Children can watch the harvest process safely, and the visual feedback of seeing cells fill and cap helps new beekeepers understand nectar flows without requiring frequent inspections.
What the Flow Hive Doesn't Do Well
Cost
A complete Flow Hive 2+ kit costs approximately $760-$930 USD. A complete Langstroth setup with the same number of boxes, plus a basic extractor shared among club members, costs $200-$350. Even if you purchase your own small hand-crank extractor ($250-$400), the total cost of a conventional setup is typically $450-$750 -- and that extractor serves multiple hives indefinitely. The Flow Hive's premium is significant, and for beekeepers with more than 2-3 hives, conventional extraction becomes far more economical on a per-hive basis.
Does Not Eliminate the Need for Inspections
This is the single most common misunderstanding, and the Flow Hive's marketing has historically contributed to it. The Flow Hive makes honey extraction easier. It does not make beekeeping easier. You still need to:
- Inspect the brood chamber every 7-14 days during the active season
- Monitor for varroa mites and treat when thresholds are exceeded
- Check queen status (egg laying pattern, brood pattern, queen cells)
- Manage swarming triggers (crowding, queen cells, congestion)
- Assess colony health (disease, nutrition, population)
- Prepare for winter (mite treatments, honey stores, ventilation, mouse guards)
- Feed syrup or pollen substitute when stores are low
The brood chamber of a Flow Hive is a standard Langstroth. Managing it requires the same skills, tools, and time commitment as any other Langstroth hive.
Plastic Comb Concerns
The Flow frames are made of polypropylene. While this material is food-safe, BPA-free, and FDA-compliant for food contact, some beekeepers have legitimate concerns about plastic in the hive environment:
- Chemical leaching: While polypropylene is considered stable, long-term studies on honey stored in direct contact with plastic comb over multiple seasons are limited.
- Bee preference: Bees strongly prefer wax to plastic. They will work Flow frames, but given a choice between wax foundation and bare plastic, most colonies choose wax first.
- Comb renewal: In a natural hive, bees replace old comb over time. Flow frames cannot be replaced in this manner -- the plastic substrate is permanent.
- End-of-life disposal: Flow frames are not recyclable through standard municipal programs. When a frame reaches end of life, it becomes plastic waste.
These concerns are not disqualifying, but they are real, and beekeepers who prioritize natural comb methods should weigh them carefully.
Limited to Honey Supers
The Flow mechanism only works for honey extraction. The brood chamber uses standard Langstroth frames, and all brood chamber management -- inspections, swarm prevention, queen rearing, splits, mite treatments -- is identical to a conventional Langstroth hive. The Flow Hive is not a fundamentally different beekeeping system. It is a Langstroth with a specialized honey super.
Flow Frame Maintenance
Flow frames require periodic cleaning. Honey residue can crystallize in the cell channels, propolis can build up in the drainage trough, and the key mechanism can stiffen over time. The manufacturer recommends cleaning Flow frames every 1-2 years by soaking them in warm (not hot) water and gently scrubbing with a soft brush. This requires removing the frames from the hive -- which means a conventional-style hive opening during a period when you would not otherwise need to open the super.
Capping Issues with Certain Nectar Types
Not all honey flows behave the same way in Flow frames. Thicker, high-glucose honeys (such as canola/rapeseed, buckwheat, and some wildflower blends) drain slowly and can crystallize in the channels before fully draining. In cool climates or during late-season flows when ambient temperatures are low, honey viscosity increases and drainage times can extend from 20 minutes to 3-4 hours per frame. In extreme cases, crystallized honey can partially block the channels, requiring the frame to be removed and soaked in warm water.
Winter Management Still Required
The Flow Hive requires the same winter preparation as any Langstroth hive: assessing honey stores in the brood chamber, treating for varroa, ensuring adequate cluster space, providing ventilation, installing entrance reducers, and protecting from moisture. The Flow frames in the honey super should be removed or protected for winter in cold climates (zones 5 and below), as the plastic does not provide the insulation value of wax comb, and residual honey in the channels can crystallize over winter.
⚠️ Warning: Never leave Flow frames on a hive in freezing climates over winter with honey still in them. Crystallized honey in the channels is extremely difficult to remove and can damage the frame mechanism when you attempt to clear it in spring.
Comparison: Flow Hive vs. Standard Langstroth
| Factor | Flow Hive | Standard Langstroth |
|---|---|---|
| Upfront cost (complete hive) | $600 - $930 | $200 - $350 |
| Extraction equipment needed | None (included in hive) | Extractor ($200-$800) or crush-and-strain |
| Extraction time per super | 1 - 3 hours (drain in place) | 2 - 4 hours (uncap, spin, return) |
| Hive inspections | Same as Langstroth | Standard |
| Learning curve (harvest) | Low | Moderate |
| Learning curve (beekeeping) | Same as Langstroth | Standard |
| Honey quality | Excellent (clean, minimal filtering needed) | Excellent (requires straining) |
| Comb material | Polypropylene (plastic) with wax coating | Beeswax on foundation (wax or plastic) |
| Frame reuse | 10+ years (plastic) | 5-10 years (wooden with wax) |
| Wintering (cold climates) | Requires Flow frame removal/protection | Standard preparation |
| Scalability (3+ hives) | Expensive ($600+ per hive) | Economical (extractor serves all hives) |
| Resale value | Moderate (niche market) | Good (universal demand) |
| Weight of honey super (full) | 40 - 55 lbs | 40 - 80 lbs (depends on depth) |
| Parts availability | Flow Hive manufacturer only | Universal (any bee supply company) |
| Mentor/club support | Limited (fewer users) | Extensive (standard equipment) |
Common Criticisms Addressed
"You still need to learn beekeeping"
This is true. The Flow Hive does not teach beekeeping, does not simplify colony management, and does not reduce the knowledge required to keep bees alive. A Flow Hive owner who neglects varroa monitoring, ignores swarm signs, or fails to prepare for winter will lose their colony just as surely as a Langstroth beekeeper who makes the same mistakes. The Flow Hive makes one task easier. It does not make beekeeping easy.
"Plastic isn't natural"
This is partially valid. Bees evolved to build comb from wax they secrete themselves. Plastic comb is an artificial substrate, and while bees accept it, they do not prefer it. However, plastic foundation has been used in standard Langstroth hives for decades, and the vast majority of commercial operations use some form of plastic in their hives (plastic foundation, plastic frame tops, polystyrene hive bodies). The Flow frame is not introducing plastic into beekeeping -- it is extending an existing practice to a new part of the comb. Whether this matters to you depends on your beekeeping philosophy.
"Too expensive for what it does"
This depends on your scale. For a beekeeper with one hive who would otherwise need to buy an extractor for $300-$400, the Flow Hive premium is approximately $300-$500 over a conventional setup. That is significant, but not outrageous for a convenience upgrade. For a beekeeper with four hives, the economics flip completely -- one $400 extractor serves all four hives, while four Flow Hives add $1,200-$2,000 in premium costs. The Flow Hive is most defensible at the 1-2 hive scale.
"It doesn't solve varroa"
True, and no one claims it does. Varroa destructor is the single greatest threat to honey bee health worldwide, and the Flow Hive has no bearing on varroa management whatsoever. Some critics use this point to dismiss the Flow Hive entirely, which is a straw man. The Flow Hive addresses honey extraction, not colony health. These are separate problems requiring separate solutions.
Who Should Consider a Flow Hive
Hobbyists with 1-2 Hives
If you keep one or two hives in your backyard, the Flow Hive's convenience premium is reasonable. You will harvest less honey than a 10-hive operation, so the time savings of Flow extraction is proportionally more significant, and the cost is spread across fewer hives.
People with Mobility Limitations
For beekeepers who have difficulty lifting heavy supers, bending over an extractor, or performing the physical work of conventional extraction, the Flow Hive offers a real accessibility improvement. Turning a key and holding a jar requires far less physical effort than pulling 40-60 pound supers and cranking an extractor.
Educators and Demonstration Apiaries
Schools, nature centers, community gardens, and public demonstration hives benefit from the Flow Hive's observation window and clean extraction process. Watching honey flow from a hive into a jar is a powerful educational moment that does not require protective gear, an extraction room, or audience proximity to open hives.
Gift and Introduction Beekeepers
If someone gifts you a Flow Hive, or if the spectacle of on-tap honey is what finally gets you into beekeeping, that has value. The Flow Hive has introduced thousands of people to beekeeping who might never have started otherwise. Some of those people become skilled, committed beekeepers. The entry point does not diminish the journey.
Who Should Skip It
Sideliner and Commercial Beekeepers
If you manage more than 5 hives, the Flow Hive does not scale economically. Conventional extraction with a motorized extractor is faster, cheaper per hive, and better suited to volume production. Flow frames also add weight to supers compared to standard foundation, which matters when you are moving dozens of boxes.
Budget-Conscious Beginners
If cost is a significant concern, spend your money on the best conventional hive you can afford, quality tools, and a good beekeeping class. A well-managed $250 Langstroth will outperform a poorly managed $900 Flow Hive every time. The hive does not make the beekeeper.
Treatment-Free and Natural Beekeepers
If your beekeeping philosophy emphasizes natural comb, chemical-free management, and minimal intervention, the Flow frame's plastic substrate conflicts with those values. You may be better served by a top bar hive or a Langstroth managed with foundationless frames, both of which allow bees to build entirely natural wax comb.
Beekeepers with Many Hives
The per-hive cost, the proprietary replacement parts, and the limited availability of Flow-specific mentorship make the system impractical for larger operations. A beekeeper with 20 hives needs scalable solutions, and conventional extraction infrastructure delivers that.
Tips for Flow Hive Owners
Ensuring Proper Capping Before Harvest
Wait until at least 80% of the cells on a Flow frame are capped before harvesting. Uncapped cells contain nectar with a moisture content above 18.6%, which can ferment in the jar. Use the observation window to estimate capping percentage, and if in doubt, briefly open the super to inspect directly.
✅ Do: Wait for full capping. Patience produces better honey than haste.
Harvesting at the Right Temperature
Honey flows best at temperatures above 77 degrees F (25 degrees C). On warm afternoons, a Flow frame can drain completely in 20-40 minutes. On cool mornings or in late autumn, the same frame may take 2-3 hours. Plan your harvests for the warmest part of the day.
Common Mistakes to Avoid
❌ Don't: Turn the Flow Key too quickly. A fast turn can crack the cell structure unevenly and leave honey trapped in unopened channels. Turn slowly and steadily, pausing briefly at each position.
❌ Don't: Forget to place a collection vessel before turning the key. The honey starts draining immediately, and you will lose the first several ounces to the ground.
❌ Don't: Leave the Flow Key in the open position overnight. The open channels allow hive pests (small hive beetle larvae, ants) to access the honey, and the bees cannot reseal the cells until the frame is closed.
Winter Preparation for Flow Frames
In USDA hardiness zones 5 and below, remove Flow frames from the hive before the first hard freeze. Store them in a cool, dry location away from mice and wax moths. Before storing, drain any residual honey by turning the key and allowing the frames to drip into a container. Once dry, seal the frames in a plastic bag or container to prevent pest infestation.
In zones 6 and above, Flow frames can remain on the hive over winter if the honey super is positioned above the inner cover (as a "feeder super") or if the colony is strong enough to maintain the cluster into the super. However, removing them is still the safer option.
Flow Frame Cleaning
Clean Flow frames every 1-2 years, or whenever honey crystallizes in the channels:
- Remove the frame from the hive.
- Open the cell channels by turning the key.
- Soak the frame in warm water (95-105 degrees F) for 30-60 minutes. Do not use hot water -- it can warp the plastic.
- Gently scrub the channels with a soft-bristle brush.
- Rinse thoroughly with clean water.
- Allow to dry completely before returning to the hive.
💡 Tip: Add a tablespoon of white vinegar to the soaking water to help dissolve crystallized honey and propolis residue. Rinse thoroughly afterward.
Managing Expectations
Your first season with a Flow Hive may not produce a harvest. New colonies installed from packages or nucs need their first season to draw comb and establish their population. The bees may fill the brood chamber but not reach the Flow super until year two. This is normal and not a failure of the Flow Hive. Be patient, manage your colony well, and the honey will come.
The Bottom Line
The Flow Hive is a well-engineered solution to one specific problem in beekeeping: the labor and equipment required to extract honey. For hobbyists with 1-2 hives, educators, and beekeepers with physical limitations, it delivers genuine value. The extraction experience is clean, simple, and satisfying.
But it is not a shortcut to competent beekeeping. The colony beneath the Flow super has the same needs, faces the same threats, and requires the same attention as any other Langstroth hive. If you buy a Flow Hive thinking it will make beekeeping easy, you will be disappointed. If you buy one understanding that it simplifies one task while leaving the rest of beekeeping unchanged, you may find it worth the investment.
The best hive is the one that fits your goals, your body, your budget, and your commitment level. The Flow Hive fits some beekeepers beautifully. For others, a standard Langstroth and a borrowed extractor is the wiser choice. Either way, welcome to beekeeping. The bees need you.
References
- Anderson, C., & Anderson, S. (2015). Flow Hive Indiegogo Campaign. Retrieved from https://www.indiegogo.com/projects/flow-hive-a-revolutionary-beehive-invention
- Flow Hive. (2026). Flow Hive Product Specifications and Care Instructions. Flow Hive Official Website. https://www.flowhive.com
- Delaplane, K. S., & Mayer, D. R. (2000). Crop Pollination by Bees. CABI Publishing.
- Somerville, D. (2005). Fat Bees Skinny Bees: A Manual on Honey Bee Nutrition for Beekeepers. Rural Industries Research and Development Corporation, Australian Government.
- Caron, D. M., & Connor, L. J. (2013). Honey Bee Biology and Beekeeping. Wicwas Press.
- Seeley, T. D. (2010). Honeybee Democracy. Princeton University Press.
- University of Minnesota Bee Lab. (2025). Beekeeping in Northern Climates Manual. University of Minnesota Extension.
- Honey Bee Health Coalition. (2025). Tools for Varroa Management. https://honeybeehealthcoalition.org/varroa
- USDA Agricultural Research Service. (2025). Honey Bee Health and Colony Collapse Disorder. https://www.ars.usda.gov/oc/br/ccd/