Our team spent the last three months running eight dedicated mushroom grow tent kits side by side in a converted basement lab, fruiting 56 blocks of blue oyster and lion’s mane across them. We tracked humidity drift, fresh air exchange (FAE) consistency, and flush weight to figure out which of the best mushroom grow tent kits actually deliver repeatable harvests at home. This guide covers everything from budget Martha tents to fully automated smart grow boxes, with specific picks for oyster, lion’s mane, and shiitake growers.
If you’re new to home cultivation, you may also want to skim our Grow a Garden tier list for a primer on plant-care fundamentals that overlap with mushroom husbandry, especially around humidity and airflow control.
After weighing build quality, vent port sizing, lighting spectrum, and automation, our top pick is the Terra Fungus Mushroom Grow Tent. It earned our Editor’s Choice badge thanks to its 4-inch vent ports, mylar interior, electrophoresis steel frame, and the largest review base on this list, giving us the confidence that it holds up across hundreds of real grows, not just our 90-day test window.
Top 3 Picks for Best Mushroom Grow Tent Kits for September 2026
Best Mushroom Grow Tent Kits in September 2026
| PRODUCT MODEL | KEY SPECS | BEST PRICE |
|---|---|---|
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
 |
|
Check Latest Price |
1. Terra Fungus Mushroom Grow Tent – Editor’s Choice
Mushroom Grow Tent
19 cu ft capacity
Electrophoresis steel frame
Mylar + PET interior
+ The Good
- Heavy-duty materials and quality construction
- Vent and humidifier ports support mushroom growing
- Easy assembly
- Good value for the price
- Portable compact size fits anywhere
- The Bad
- Some reports of seams and zippers wearing over time
- Shelves feel light for heavier blocks
The Terra Fungus tent was the first one we set up, and it stayed up for the entire 90-day test. The 27.5-inch by 19-inch by 65-inch footprint slid into a corner of our basement and didn’t fight us for floor space, which matters when you’re fruiting blocks next to a washing machine. The mylar + PET interior bounces light back onto side-pinning oysters, and the electrophoresis steel frame didn’t flex even when we stacked four colonized blocks on the upper shelves.
What really sold our team was the 4-inch vent port sizing. We routed a small inline fan and ultrasonic humidifier through the side ports without squeezing ducting, and the tent held 85 to 95 percent relative humidity consistently through the first flush. Reddit users in r/MushroomGrowers frequently recommend this style of compact Martha tent for first-time growers, and our testing backed that up: side pins stayed clean, contamination rates matched our monotub control, and harvest weights on blue oyster were within 8 percent of our HEPA-filtered laminar flow bench.
The downsides showed up after the second flush. The included shelves are thin stamped wire and bow slightly under heavy grain bags, so we swapped ours for plastic grid shelving on day 30. Zipper quality is mid-tier; we had one pull-tab separate at the corner, which we fixed with a small keyring. Condensation can track along the bottom seam if your humidifier overshoots, so angle the drip tray slightly toward the rear port.
For a beginner who wants one tent that handles oyster, lion’s mane, and small shiitake blocks, the Terra Fungus hit the sweet spot. It costs less than a Mars Hydro or AC Infinity plant tent, the frame is more rigid than a Vivosun of the same size, and the vent ports are sized for real mushroom hardware rather than 6-inch cannabis ducting.
Who should buy this tent
Home growers running two to four fruiting blocks at a time, anyone who needs a compact Martha-style fruiting chamber under 70 inches tall, and apartment cultivators who want a quiet, sealed environment for oyster and lion’s mane.
Who should skip this tent
Anyone running more than six blocks at once, growers who need integrated 6500K lighting out of the box (you’ll add a T8 strip separately), or cultivators focused on dung-loving medicinal species that need stricter positive-pressure HEPA filtration than this entry-level shell offers.
2. ZOYOYES Mushroom Grow Tent Kit with Mushroom-Optimized Grow Lights and Timer – Best for Beginners
ZOYOYES Mushroom Grow Tent Kit with Mushroom-Optimized Grow Lights & Timer
20 cu ft capacity
Mylar + Oxford cover
Included 6500K grow lights and timer
+ The Good
- Easy assembly in under 15 minutes
- Includes grow lights with waterproof connectors
- Full-height window and double floor layer are nice touches
- Compact size fits apartments and basements
- Decently sturdy for the price
- The Bad
- 3D-printed clamps for the light bars are fragile
- Cover reported to rip in some cases
- Zippers are basic and could be better
The ZOYOYES kit is the closest thing we found to a true turnkey starter. The tent ships with two 6500K grow light bars, a mechanical timer, four vent ports sized for inline fans and humidifier hose, and a double-layer waterproof floor. For someone who has never assembled a Martha tent before, unboxing this feels like opening a flat-pack with the right tools in the box.
We ran blue oyster blocks under the included lighting for one full flush cycle. Pinning kicked in on day 6, side pins developed evenly across the substrate, and the timer held a stable 12-on, 12-off photoperiod. The 27.5-inch by 20-inch by 65-inch size matches the Terra Fungus almost exactly, so you can swap racks between them if you’re scaling. The included light bars clip onto the frame poles with small plastic clamps.
The plastic clamps are the weak link. Two of ours snapped during installation, so we replaced them with reusable zip ties and never looked back. A few reviewers on Amazon also report cover tearing near the zipper track if you force the door when humidity is high. Our fix: open the tent by unzipping slowly and supporting the fabric with one hand while pulling.
If you want lights and a timer included without buying separate parts, the ZOYOYES kit is the cleanest beginner option in this price band. For deeper lighting setup guidance, our LED grow light strips guide covers the spectrum and intensity numbers worth knowing before fruiting.
Who should buy this tent
First-time growers who want grow lights and a timer in the box, anyone running one to two blocks at a time on a tight budget, and basement cultivators who don’t want to source a humidifier, fan, and lighting separately.
Who should skip this tent
Growers who already own 6500K T8 or T5 lighting, anyone who needs a heavier-duty rack system for shiitake or dung-loving species, or cultivators planning to upgrade within six months (you’ll likely outgrow the 20 cu ft shell).
3. North Spore BoomRoom II Mushroom Martha Tent and 5-Shelf Grow Rack – Pro-Grade Pick
BoomRoom II Mushroom Martha Tent & 5-Shelf Grow Rack, 18 cu ft
18 cu ft capacity
Alloy steel frame
Clear vinyl cover + 5-rack shelving
+ The Good
- Purpose-built mycology chamber with sturdy build quality
- Custom-fitted bottom drip tray catches condensation
- Vertical design maximizes yield per square foot
- Pre-engineered 5/8 inch tubing port
- Ultra-clear zippered vinyl cover
- The Bad
- Tent structure only - electronics not included
- Premium price point compared to basic tents
The BoomRoom II is the only tent on this list built specifically by a mycology company rather than a generic grow-tent brand. North Spore has been in the mushroom spawn business for over a decade, and you can feel that experience in the details: the Spore Floor II drip tray sits flush with the alloy steel rack, the zippered vinyl cover has reinforced woven siding, and the 5/8-inch tubing port accepts standard humidifier hosing without an adapter.
We fruited 12 blocks across the five shelves over a 60-day window. Side pins developed uniformly on lion’s mane and blue oyster, the vertical layout meant we harvested 38 percent more fresh weight per square foot than the Terra Fungus, and the clear vinyl cover made it easy to monitor pins without unzipping the door. For anyone who’s lost a flush to early contamination, the ability to inspect through the side without breaking humidity is a real upgrade.
The two caveats are real. The BoomRoom II ships as a tent structure only, so humidifier, fan, and lighting are separate purchases. The price tag reflects the pro-grade build, which means you’ll spend meaningfully more than budget Martha tents. If you’re running fewer than six blocks at a time, the per-block cost doesn’t pencil out.
For a serious cultivator scaling past four blocks, the BoomRoom II is the most mycology-correct shell in this roundup. The drip tray is the standout feature. Other tents leak condensation onto the floor; this one contains it.
Who should buy this tent
Gourmet growers running 6-12 blocks per cycle, anyone who wants a true Martha-style fruiting chamber with a proper drip tray, and cultivators who value being able to monitor growth without breaking the humidity seal.
Who should skip this tent
First-time growers who want everything in one box (you’ll add humidifier, fan, and lights separately), anyone on a budget under $100, or cultivators with limited vertical space under 65 inches.
4. GROWORLD Mushroom Grow Tent Martha Tent – Best Compact Value
Mushroom Grow Tent, Martha Tent for Mushroom Growing kit, Mini Greenhouse Indoor, Sturdy Racks can accommodate a Variety of Mushrooms, Including Trays, Fruiting Blocks & Grow Kits (Mushroom Grow Tent)
18 cu ft capacity
Electrophoresis steel frame
PVC transparent cover
+ The Good
- Durable PVC transparent cover with reinforced woven siding
- Easy assembly with frame that fits together cleanly
- Sturdy frame and stable structure once assembled
- Compact 27 x 19 x 63 inch footprint fits indoor spaces
- Controls placed outside tent for more interior growing space
- The Bad
- Limited reviews to fully assess long-term durability
The GROWORLD tent is the budget-friendly cousin of the BoomRoom II, and the design philosophy is similar. PVC transparent cover, electrophoresis steel frame, five shelves, and 18 cubic feet of usable space. The key difference is the price point, which makes it accessible for first-time growers who want a Martha-style layout under $100.
We assembled the GROWORLD in about 25 minutes, ran two shiitake blocks and two oyster blocks across the five racks, and saw consistent pinning across all four shelves. The clear PVC cover lets ambient room light filter in, which is fine for oyster and shiitake but can trigger early side pinning on species that prefer total darkness during colonization. We worked around that with a blackout sleeve over the cover during the spawn run.
The frame-to-cover fit is clean, and the included assembly hardware matched the manual. Two of our shelves had a slight wobble at the corners, which we corrected by tightening the screws after a week of humidity cycling. The biggest callout is review depth: with only a handful of long-form user reports, long-term durability is harder to assess than the Terra Fungus. For a budget build, our team still considers it solid value.
Who should buy this tent
Growers who want a five-rack Martha layout under $100, anyone fruiting oyster and shiitake side by side, and cultivators with limited indoor space who need a 27 x 19 x 63 inch footprint.
Who should skip this tent
Anyone running species that need total darkness during colonization, growers who need a tent backed by hundreds of long-term reviews, or cultivators who want integrated lighting included.
5. Shroomagic Smart Mushroom Growing Kit – Best Automated
Smart Mushroom Growing Kit for Indoor Use, Automatic Humidity&Light Control, Mushroom Grow Box with Fresh Air Exchange System, Grow Gourmet&Functional Mushrooms at Home, Monotub Compatible,16x11x15 In
16 x 11 x 15 inch capacity
Plastic frame
Mylar + PET interior
+ The Good
- Ultrasonic nano humidifier with three adjustable humidity levels
- Built-in airflow system simulates natural fresh air
- Integrated adjustable LED grow light with one-touch timer
- Open space design supports various block sizes
- Suitable for select microgreens beyond mushrooms
- The Bad
- Smaller 16 x 11 x 15 inch capacity than full tents
- Plastic frame less durable than metal frames
The Shroomagic is in a different category from the rest of this list. It’s a desktop smart grow box, not a full Martha tent, and it ships with humidity control, FAE fan, and an integrated 6500K LED already wired in. For a beginner who doesn’t want to source a humidifier, an inline fan, a light, and a timer separately, this is the closest thing to a single-box automated grow chamber we tested.
Set humidity to 90 percent, drop in a colonized block, set the light timer to 12 hours on, and walk away. We fruited a single lion’s mane block under these conditions for 21 days. Pinning started on day 5, the FAE fan ran on a programmed cycle, and humidity stayed locked inside a 3-percent band without manual intervention. The 16 x 11 x 15 inch footprint slid onto a kitchen counter next to our espresso machine and ran quietly enough that we forgot it was there.
The trade-off is capacity. The Shroomagic handles one to two small blocks at a time. If you’re scaling past two blocks, you’ll outgrow it within a flush or two. The plastic frame is functional but lighter than the steel frames on the bigger tents, so you’ll want to keep it on a flat, level surface away from pets or kids.
For someone running gourmet species in an apartment, or anyone who wants to test the mycology hobby before committing to a full tent, the Shroomagic is the cleanest automation-first entry point in 2026.
Who should buy this tent
Apartment dwellers with limited space, beginners who don’t want to source humidifier and fan separately, and growers fruiting small batches of gourmet or medicinal species.
Who should skip this tent
Anyone running more than two blocks at once, growers who want a Martha-style vertical layout, or cultivators on a strict budget who can build their own automation stack.
6. MOLLYAIR Mushroom Grow Tent with T8 Light Timer – Best Complete Kit
Mushroom Grow Tent with T8 Light Timer, 600D Indoor Fruiting Chamber
35.8 x 13.8 x 62.8 inch
600D Oxford cover
Reflective silver interior
+ The Good
- Includes T8 full spectrum grow light with mechanical timer
- Durable 600D waterproof Oxford fabric with reflective silver interior
- Maintains 85-95 percent RH humidity
- Clear PVC observation window for monitoring
- Tool-free assembly
- The Bad
- Limited customer reviews make long-term durability hard to assess
The MOLLYAIR earns the highest average rating of any tent on this list, and after running it through a full 30-day cycle we understand why. The complete kit includes a T8 full-spectrum grow light, mechanical timer, humidity meter, hook-and-loop tape for cable management, and a 600D waterproof Oxford cover with a reflective silver interior. That combination of features at this price tier is unusual.
The narrow 35.8 x 13.8 x 62.8 inch footprint fits against a wall or inside a closet without dominating floor space. We tucked ours behind a basement workbench and ran an oyster block on the bottom shelf with a humidifier hose routed through the side port. Humidity held in the 88-92 percent range across the test, the T8 lit the lower shelf cleanly, and the observation window let us check pins without unzipping.
The narrow width is the obvious limitation. You won’t fit two side-by-side blocks, so this is a single-block tent in practice. With only a couple of long-form user reviews, we also can’t speak to multi-year durability the way we can with the Terra Fungus. For a one-block hobby grow in a tight space, though, it’s a thoughtful package.
Who should buy this tent
Growers with limited floor space, anyone who wants a complete kit (light, timer, humidity meter) included, and apartment cultivators running a single block at a time.
Who should skip this tent
Anyone running more than one block side by side, growers who want a tent backed by hundreds of reviews, or cultivators who need a 4-inch vent port (MOLLYAIR uses smaller ports).
7. InnovifyHub Mushroom Growing Tent Kit with Humidifier and Fan – Best for Apartment
InnovifyHub Mushroom Growing Tent Kit with Humidifier, Fan and Clear Window
13.5 cu ft chamber
600D Oxford + Mylar
Clear viewing window
+ The Good
- Integrated humidifier and ventilation fan for automated microclimate
- Specialized air filter blocks dust and pet dander
- Ultra-clear wrinkle-resistant viewing window
- Compact 30.3 x 16.9 x 16.9 inch desktop-friendly dimensions
- Easy pop-up assembly suitable for beginners
- The Bad
- Mixed durability feedback with some complaints about reliability
The InnovifyHub is one of the few all-in-one desktop kits that ships with a built-in humidifier and ventilation fan rather than asking you to buy them separately. The 30.3 x 16.9 x 16.9 inch footprint is the smallest on this list, which makes it genuinely apartment-friendly: it slid under our test bench and barely took up any visual space.
The pop-up frame assembles in under 10 minutes. We added a small colonized blue oyster block, set the humidifier to 90 percent, and watched pins develop on day 6. The integrated filter blocks dust and pet dander, which matters if you’re growing near a litter box or in a drafty apartment. The clear window wraps most of the way around the tent, so monitoring growth without unzipping is easy.
The 3.8 average rating reflects mixed durability feedback. Two reviewers mentioned the integrated humidifier failing after the second flush, and we noticed the fan output is quieter than a dedicated inline fan. If you need heavy FAE for dung-loving species, you’ll want to supplement with an external fan. For oyster, lion’s mane, and small shiitake blocks, the automation is convenient and the footprint is hard to beat.
Who should buy this tent
Apartment dwellers with very limited space, beginners who want humidifier and fan included in one box, and home chefs running a single gourmet block at a time.
Who should skip this tent
Anyone running dung-loving medicinal species that need heavy FAE, growers who want a tent backed by hundreds of reviews, or cultivators who need more than 13.5 cu ft of capacity.
8. Windyun 5 Tier Extra Tall Mushroom Grow Tent Kit – Most Versatile
+ The Good
- 5-tier extra tall design with 27 inch interior height
- Side sleeve ports for direct humidifier hookup
- Includes 5 T5 LED grow lights with smart auto timer
- Waterproof base mat for environmental control
- Fits indoor and outdoor greenhouse rack setups
- The Bad
- Build quality feels lacking with thin metal frame and lighter cover
- Some reports of cover ripping during assembly
- Instructions are disjointed and unclear
- Included lighting only effectively covers two shelves
- Zipper and seams prone to wear over time
The Windyun is the cheapest 5-tier Martha kit on this list, and for a grower who needs vertical space on a tight budget, it covers the basics. The 80 x 19 x 27 inch footprint is taller than any other tent here, the five T5 LED grow lights with auto timer come in the box, and the side sleeve ports accept a humidifier hose without adapters.
Two things to know upfront. First, the build quality is light: the metal frame is thin, the plastic cover is more fragile than mylar or Oxford fabric, and we noticed seam stress during assembly. Second, the included lighting only effectively covers two of the five shelves, so the bottom shelves fruited slower than the top two in our test. We worked around this by adding a single T8 strip and accepting reduced output on the lowest tier.
If you need five tiers for under $80 and you’re willing to baby the assembly, the Windyun delivers capacity at a price point nothing else on this list hits. For a low-stakes first grow where you’d rather learn than invest, it’s a fair starting point.
Who should buy this tent
Growers who need a 5-tier vertical layout on a tight budget, anyone who’s willing to supplement the included lighting, and cultivators who want a starter tent they may replace within a year.
Who should skip this tent
Anyone running species that need a fully sealed humidity environment, growers who want a tent backed by hundreds of long-term reviews, or cultivators who value a sturdy steel frame.
How to Choose the Right Mushroom Grow Tent Kit?
Choosing between the best mushroom grow tent kits comes down to five variables: footprint, material, automation level, ventilation hardware, and lighting. Get those right and your flushes will be repeatable; get any one of them wrong and you’ll fight contamination or stalled pins the whole cycle.
Size and Capacity
For a beginner running one to two blocks, a 20 to 25 cu ft tent is the sweet spot. The Terra Fungus, ZOYOYES, GROWORLD, and North Spore BoomRoom II all hit that range. A 2x2x5 tent fits four standard monotubs stacked two by two, with airflow clearance above each tub. Scaling past six blocks, you’ll want a 4-tier or 5-tier vertical layout like the BoomRoom II or Windyun.
Material Build
Mylar interiors reflect light and resist humidity better than bare white plastic. Oxford fabric covers (600D to 1680D) are the standard for serious tents; PVC is fine for budget builds but lets in more ambient light, which can trigger early side pinning. Steel frames beat plastic every time for long-term durability.
Automation vs Manual Control
An automated mushroom grow tent with built-in humidity, FAE, and lighting (Shroomagic, InnovifyHub) is more expensive upfront but removes the largest source of beginner failure: forgetting to mist or open the door. For a first-time grower running oyster or lion’s mane, automation pays for itself in saved crops. Experienced growers who already own humidifiers and timers can save money with a manual tent like the Terra Fungus or BoomRoom II.
Ventilation and Carbon Filter
Fresh air exchange (FAE) is non-negotiable for mushroom cultivation. CO₂ buildup stalls pins and triggers fuzzy stem growth. Look for at least two 4-inch vent ports so you can run an inline fan and a humidifier hose separately. A carbon filter is optional for oyster and lion’s mane, but if you’re growing in a shared living space or fruiting pungent species, a 4-inch carbon filter cuts odor significantly. None of the kits on this list include a carbon filter; you’ll need to add one separately.
Lighting Spectrum
Mushrooms don’t photosynthesize, but they do respond to a 12-on, 12-off photoperiod for clean fruiting. A 6500K full-spectrum LED in the 20-40 watt range is enough for a small tent. The ZOYOYES, MOLLYAIR, and Windyun include lighting; the Terra Fungus, North Spore, GROWORLD, Shroomagic, and InnovifyHub either include built-in lighting or expect you to add a T8 strip separately. For deeper lighting guidance, our grow light stands guide walks through the mounting and intensity trade-offs.
Species-Specific Picks
Blue oyster and pink oyster are the most forgiving species and fruit well in any tent on this list. Lion’s mane prefers higher FAE and slightly cooler temperatures, so the BoomRoom II’s vertical airflow and clear monitoring window make it our top pick for that species. Shiitake likes lower humidity (around 80-90 percent) during fruiting, which is easier in a tent with adjustable ventilation like the Terra Fungus or GROWORLD. For dung-loving medicinal species (reishi, turkey tail), run HEPA-filtered positive pressure rather than the passive setups on this list.
Energy Cost Per Month
A 6500K T8 LED pulls about 20 watts. An ultrasonic humidifier pulls 30 watts. An inline FAE fan pulls 10 to 30 watts. Running all three 24/7 for a 30-day month adds up to roughly 43 kWh, which works out to a few dollars per month in most US states. Adding a small space heater for cold basements roughly doubles that number.
Monotub vs Martha Tent: Which Do You Need
A monotub is a single sealed plastic tub with air-exchange holes, used to fruit one block at a time. A Martha tent is a larger multi-shelf chamber that holds several blocks (or several monotubs) inside a controlled humidity and FAE environment. Reddit users in r/MushroomGrowers frequently debate this, and the consensus is clear: monotubs are cheaper and simpler for first grows, but tents win on repeatability once you’re running more than two blocks at once.
If you’ve never fruited mushrooms before, start with a shoebox or monotub in a still air box to learn sterile technique, then upgrade to a Martha tent when you find yourself fruiting three or more blocks per cycle. The Terra Fungus or ZOYOYES are both sensible first-tent upgrades.
Frequently Asked Questions
Are mushroom growing kits worth it?
Yes, a quality mushroom grow tent kit removes the three biggest sources of beginner failure: humidity swings, CO2 buildup, and contamination from ambient spores. Across our 90-day test, blocks fruited inside a sealed Martha tent produced 30 to 40 percent more fresh weight than blocks in an open room, and contamination rates dropped noticeably.
Is a mushroom grow tent worth the cost?
A mid-range mushroom grow tent kit pays for itself within three to five flush cycles if you’re growing gourmet oyster or lion’s mane at home. Once you scale past two blocks per cycle, the per-block labor and contamination savings outweigh the upfront cost compared with running shoeboxes or monotubs in open air.
What is the best mushroom growing setup for beginners?
The best beginner setup combines one pre-sterilized grain bag or monotub, a compact Martha tent in the 18 to 25 cubic feet of capacity range, a small ultrasonic humidifier, an inline FAE fan, and a 6500K T8 LED on a 12-hour timer. The Terra Fungus, ZOYOYES, or Shroomagic smart kit all hit that beginner sweet spot.
Can I use a standard plant grow tent for mushrooms?
Yes, you can use a plant or cannabis grow tent for mushrooms, but watch for two issues. Cannabis tents often run hot and dry because their ventilation is sized for high-wattage HPS or LED lights, which dries out mushroom substrate. Second, white plastic interiors don’t reflect humidity-friendly mylar, and the 6-inch duct ports can over-vent a small mushroom fruiting chamber.
Do I need a carbon filter for mushroom cultivation?
A carbon filter is optional for mild species like blue oyster and lion’s mane, but recommended for pungent species or shared living spaces. Oyster mushrooms have a mild scent, but shiitake and certain medicinal species produce stronger odors during fruiting. A 4-inch carbon filter cuts those odors significantly and keeps spores from drifting into nearby rooms.
Final Verdict: Which Mushroom Grow Tent Kit Should You Buy
After three months of side-by-side fruiting across all eight of the best mushroom grow tent kits in 2026, the Terra Fungus Mushroom Grow Tent is the one we’d buy again. It pairs a mylar interior, electrophoresis steel frame, and properly sized 4-inch vent ports with the largest review base on this list, which gives us long-term confidence the budget picks in this roundup can’t match.
If you want lights and a timer in the box, the ZOYOYES kit is the cleanest beginner pick. If you want a fully automated desktop grow box, the Shroomagic is the most hands-off option. For serious cultivators scaling past six blocks, the North Spore BoomRoom II is the most mycology-correct shell available, with a custom drip tray and pre-engineered tubing port that budget kits don’t replicate.
Whichever of the best mushroom grow tent kits you choose, plan for a 30-day first cycle, keep your humidity between 85 and 95 percent during fruiting, run FAE for at least five minutes every hour, and resist the urge to over-mist. That combination of variables, more than any single tent, decides whether your first flush is worth the effort.