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Fermentation Jars

Maybe

An estimated 0.4% of orders come back. But demand is soft, at -20.6% this quarter, so Fermentation Jars is a Maybe.

Flapen Score
58
58 / 100
Top 23% of 5,777 Home & Garden niches · +7 vs the category median of 51
Market size
£152K/yr200K searches / yr
90-day growth
-20.6%search demand this quarter
Competition
39%top-5 click share · 24 brands · 68 sellers

Flapen Score

Fermentation Jars against its category

The dotted line is the Home & Garden average. Past it, Fermentation Jars is stronger. Inside it, weaker.

58Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Fermentation Jars market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Fermentation Jars 200K times last year and spent an estimated £152K. The top 5 brands take 70% of clicks. Demand peaks in Jan–Dec. Flapen scores it 58 out of 100, a Maybe.

01 · Demand

An estimated 4.3% of those searches ended in a purchase.

Shoppers searched for this 200K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 4.3% of those searches ended in a purchase. Searches in the last 90 days moved -20.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated £152K a year.

Searches, last 12 months
200K
Growth, 90 days vs prior 90
-20.6%
Conversion, latest week
4.3%
Market size, estimated
£152Ka year
Peak month
December1.9× the quietest month
Top search term
fermentation jars88K searches a year

02 · Price

A sale here is worth £17.55.

Listings sell for £17.55 on average, from £3.45 to £38.07. Amazon reports units sold in ranges. This niche sold 6K to 8K a year. The average listing sells 100 to 250 of them. At £17.55 that is £2K to £4K a year per listing.

Average price
£17.55inside the $15 to $100 sweet spot
Price range
£3.45–£38.07
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
6K–8K
Units per listing a year
100–250
Revenue per listing a year
£2K–£4K
Returns
0.4%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

82% of listings pay for placement with sponsored ads. 76% ship with Prime. On an average day, 9.9% of listings are out of stock. The average listing ranks #187 within Preserving. It carries 751 reviews at 4.30 stars, so a new listing needs social proof before a better product.

Sponsored listings
82%
Prime listings
76%
Out of stock, average day
9.9%
Average rank
#187in Preserving
Average rating
4.30 starsAmazon United Kingdom average 4.36 stars
Average reviews
751per listing
Listings tracked
45

04 · Newcomers

2 of last year's 14 launches cleared the first-year sales bar.

14 products launched here in the last 12 months. 2 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 36 months on average, so the names here are settling in.

Launched, last 12 months
14
Successful launches
2Amazon's first-year sales bar
Average brand age
36 months

Products

Top Fermentation Jars products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 27, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 39% of clicks, no more. An open shelf where new products get seen.

£0£5K£9K£14K£18K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

24 rising

Sellers

68

Est. top-5 brand share

70%

Top 20: 98%

Est. top-5 click share

39%

Top 20: 82%

Open market

25%

  • HEFTMAN19%
  • volila17%
  • Kilner17%
  • SwiftSlot11%
  • YUEYEE6%
  • lakeland5%

Demand

Fermentation Jars search demand

Weekly searches over the year, seasonality beneath. Pick a range.

6K4KSpike '24Holiday '24Spike '25Holiday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Dec · busiest ÷ quietest = 1.9×

Search terms

Top Fermentation Jars search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • fermentation jars88K/yr
  • fermenting jar20K/yr
  • fermentation jar16K/yr
  • kimchi jar14K/yr
  • fermentation kit13K/yr
  • fermenting jars10K/yr
  • sauerkraut fermentation jar9K/yr
  • fermentation jars with weights6K/yr
  • fermenting jars with weights6K/yr
  • kilner fermentation jar5K/yr

Reviews and returns

What reviews say buyers love and hate about Fermentation Jars

We read the reviews and the return reasons for every product selling here.

27%of positive reviews mention “Quality-Overall”
15%of negative reviews mention “Size-Overall”
0.4%of orders come back
“Wish jar was larger”
A buyer, on “Size-Overall”15% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

19 topics

NegativePositive

FAQ

Common Fermentation Jars questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data