monotub
Worth a lookShows low returns (0.6%), but soft demand (+2.4% this quarter) keeps it on the watch list.
Returns
Incredible0.6%return rate — above 5% kills the launch gate
Review moat
Great312.33avg incumbent reviews — the moat a new listing must climb
Avg price
Great$76.82avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Market size
Okay$267K$267K/yr · 156K searches
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Price range
Okay$16.62–$286.14cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+2.4%90-day search growth — must beat 0% to launch
Conversion
Okay2.2%search→purchase rate — share of searches ending in a sale
Brand share
Okay88%top-5 brand share — brands hold most of the demand
According to Flapen's Amazon United States niche tracking, monotub is a $267K/yr Amazon United States market (156K searches/yr). The top 5 brands hold 88% of demand. Verdict: Worth a look — 50/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
monotub market data
- Units sold / yr
- 4K–5K
- avg 100–250/product
- Revenue / yr
- $307K–$384K
- units × avg price
- Conversion rate
- 2.2%
- Avg BSR
- #371
- Page quality
- 0%
- Prime
- 61%
- Sponsored
- 89%
- Out of stock
- 5.0%
- Avg brand age
- 36 months
- Avg seller age
- 161 days
Competition & brand share
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
13
Top-5 brand share
88%
Top 20: 100%
Top-5 click share
63%
Top 20: 100%
Open market
9%
- Myco Labs60%
- Boomer Shroomer13%
- North Spore6%
- DECOHS5%
- YANWEN4%
- Gro Magik3%
- Open — no brand owns it (5 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top monotub search terms
- monotub69K/yr
- mushroom grow box14K/yr
- monotub mushroom grow kit16K/yr
- mushroom monotub15K/yr
- mono tub10K/yr
- mushroom fruiting chamber8K/yr
- fruiting chamber4K/yr
- mushroom tub5K/yr
- monotube4K/yr
- monotub kit4K/yr
Top monotub products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Myco Labs Growers Select Mushroom Monotub Fruiting Chamber with Filter Disks and Liner
Myco Labs$34.684.7★1,044 rev
Growers Select 28Q Cube Mushroom Monotub Fruiting Chambers with Filter Disks and Liners (2 Pack)
Myco Labs$37.934.6★294 rev
![Boomer Shroomer Inflatable Monotub Kit Mushroom Growing Kit Includes a Drain Port Plugs & Filters Removeable Liner [Patent No: US 11 871 706 B2]](https://m.media-amazon.com/images/I/41PtZboauwL.jpg)
Boomer Shroomer Inflatable Monotub Kit Mushroom Growing Kit Includes a Drain Port Plugs & Filters Removeable Liner [Patent No: US 11 871 706 B2]
Boomer Shroomer$27.994.4★490 rev
Myco Labs Growers Select 28Q Cube Mushroom Monotub Fruiting Chamber with Filter Disks and Liner
Myco Labs$24.904.7★1,044 rev
Myco Labs Growers Select 66Q Large Mushroom Monotub Fruiting Chamber with Filter Disks and Liner
Myco Labs$43.364.7★1,044 rev
Newest
by launch date
Smart Growing Chamber for Indoor Mushroom Cultivation Eco Box with Grow Lights & Lighting Lamps Temperature & Humidity Monitoring & Display Monotub Grow Kit with Automatic Humidification & Ventilation
MOFOGDR$286.142 rev
Smart Mushroom Grow Box Automatic Humidification and Water Spray Mushroom Grow Chamber with Grow Light Smart Mushroom Monotub Growing Kit 16x11X13 inches with LCD Screen Smart Growing Tent
BEIXIFO$279.164 rev
DECOHS 2 Pack Monotub Mushroom Grow Kit 6.5 x 5 x 6.5 Small Mushroom Fruiting Chamber Propagation Boxes Monotub Mushroom Growing Box Mini Greenhouse with Spray Bottle for Horticulture Supplies
DECOHS$16.6218 rev
DECOHS 4 Pack Monotub Mushroom Grow Kit 6.5 x 5 x 6.5 Small Mushroom Fruiting Chamber Propagation Boxes Monotub Mushroom Growing Box Mini Greenhouse with Spray Bottle for Horticulture Supplies
DECOHS$19.7018 rev
Mushroom Grow Tent
Terra Fungus$84.62100 rev
Trending
90-day click momentumSmart Mushroom Grow Box Automatic Humidification and Water Spray Mushroom Grow Chamber with Grow Light Smart Mushroom Monotub Growing Kit 16x11X13 inches with LCD Screen Smart Growing Tent
BEIXIFO$279.162.6★
Smart Growing Chamber for Indoor Mushroom Cultivation Eco Box with Grow Lights & Lighting Lamps Temperature & Humidity Monitoring & Display Monotub Grow Kit with Automatic Humidification & Ventilation
MOFOGDR$286.143.9★
DECOHS 2 Pack Monotub Mushroom Grow Kit 6.5 x 5 x 6.5 Small Mushroom Fruiting Chamber Propagation Boxes Monotub Mushroom Growing Box Mini Greenhouse with Spray Bottle for Horticulture Supplies
DECOHS$16.623.4★
YANWEN Mushroom Growing Kit Monotub Stackable Grow Box Fruiting Chamber with FAE Filters Indoor Use 12.6 x 12.6 x 6.3 inches Clear and Black
YANWEN$33.294.6★
DECOHS 4 Pack Monotub Mushroom Grow Kit 6.5 x 5 x 6.5 Small Mushroom Fruiting Chamber Propagation Boxes Monotub Mushroom Growing Box Mini Greenhouse with Spray Bottle for Horticulture Supplies
DECOHS$19.703.4★
What buyers say about monotub
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent product”
“Easy to use”
“Just what I needed”
“the structure feels sturdy enough for regular use”
“very affordable”
“Worked very well helped with the process of growing mushrooms”
“Perfect size”
“Nice setup”
“Sturdy and well made”
“Made of very durable material”
What buyers complain about
“Too Small”
“the quality control is abysmal”
“1 had a small leak”
“but is a bit pricey for what it is”
“At first I thought these are way too small to be growing mushrooms”
“contaminate my monotubs”
“Cake just dries out”
“Instructions are very lacking so if you don't know what you're doing you'll be getting your guidance elsewhere”
“A little cumbersome”
“Its not sturdy”
Top return reasons
Common questions
- Is monotub profitable to sell on Amazon United States?
- The niche generates $267K/yr across 18 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +2.4%. Flapen's verdict: Worth a look (50/100).
- How competitive is the monotub niche?
- 11 brands and 13 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 88% of demand.
- What do buyers complain about in monotub?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Leak-Proof. The return rate is 0.6%.
- When does demand for monotub peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the monotub niche?
- Listings span $16.62–$286.14; the average listing price is $76.82 (sweet spot $15–$100). The average incumbent carries 312 reviews — the moat a new listing must climb.