Worm Castings
FailShoppers spend an estimated $29K a year here, so Worm Castings is a Fail.
- Flapen Score
- 40 / 100Ranks 4,839 of 5,777 Home & Garden niches · −11 vs the category median of 5140
- Market size
- £29K/yr56K searches / yr
- 90-day growth
- +1.9%search demand this quarter
- Competition
- 68%top-5 click share · 7 brands · 7 sellers
Flapen Score
Worm Castings against its category
The dotted line is the Home & Garden average. Past it, Worm Castings is stronger. Inside it, weaker.
Market
The Worm Castings market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for Worm Castings 56K times last year and spent an estimated £29K. The top 5 brands take 92% of clicks. Demand peaks in Mar–Apr–May. Flapen scores it 40 out of 100, a Fail.
01 · Demand
An estimated 5.6% of those searches ended in a purchase.
Shoppers searched for this 56K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 5.6% of those searches ended in a purchase. Searches in the last 90 days moved +1.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £29K a year.
- Searches, last 12 months
- 56K
- Growth, 90 days vs prior 90
- +1.9%
- Conversion, latest week
- 5.6%
- Market size, estimated
- £29Ka year
- Peak month
- April3.1× the quietest month
- Top search term
- worm castings42K searches a year
02 · Price
A sale here is worth £9.33.
Listings sell for £9.33 on average, from £4.94 to £16.48. Amazon reports units sold in ranges. This niche sold 3K to 3K a year. The average listing sells 100 to 250 of them. At £9.33 that is £933 to £2K a year per listing.
- Average price
- £9.33under the $15 to $100 sweet spot
- Price range
- £4.94–£16.48
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 3K–3K
- Units per listing a year
- 100–250
- Revenue per listing a year
- £933–£2K
- Returns
- 0.1%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is low.
64% of listings pay for placement with sponsored ads. 64% ship with Prime. On an average day, 7.7% of listings are out of stock. The average listing ranks #314 within Fertilisers & Plant Food. It carries 235 reviews at 4.42 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 64%
- Prime listings
- 64%
- Out of stock, average day
- 7.7%
- Average rank
- #314in Fertilisers & Plant Food
- Average rating
- 4.42 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 235per listing
- Listings tracked
- 14
04 · Newcomers
0 of last year's 4 launches cleared the first-year sales bar.
4 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 58 months on average, so the names here are settling in.
- Launched, last 12 months
- 4
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 58 months
Products
Top Worm Castings 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 26, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Growcery Worm Castings - Premium Fertiliser for Plants Superior Soil Improver UK and Rich Vermicompost for Enhanced Plant Health and Vigour Fertiliser for plants outdoor and indoor (1L)
- Price
- £6.68
- Rating
- 4.6/5
- Reviews
- 96
- Age
- 2y ago

Black Gold Worm Castings 100% Organic Microbe-Rich Fertiliser Improves Soil Retains Moisture & Boosts Growth For Houseplants Gardens & Lawns (5 Litre)
- Price
- £11.93
- Rating
- 4.1/5
- Reviews
- 43
- Age
- 10mo ago

Worm Castings Pure Natural Multipurpose Fertilizer for Indoor and Outdoor Plants Vermicompost TopSoil Builder Improver Plant & Root Growth Feed Fertiliser for Potting Germination NPK Nutrient
- Price
- £10.63
- Rating
- 4.5/5
- Reviews
- 463
- Age
- 5y ago

Baltic Worm Worm Castings 5 Liter - Pure Multipurpose Fertiliser Vermicompost - Natural Top Soil Builder and Improver Plant Feed for Potting Germination Growing
- Price
- £16.48
- Rating
- 4.6/5
- Reviews
- 1,245
- Age
- 9y ago

Plantalaya Worm Castings Organic Soil Booster & Natural Plant Food Premium Earthworm Casting Nutrient Rich Soil Improver (0.5 Litre)
- Price
- £5.86
- Rating
- 4.2/5
- Reviews
- 3
- Age
- 2mo ago
Trending
estimated 90-day click momentum
Plantalaya Worm Castings Organic Soil Booster & Natural Plant Food Premium Earthworm Casting Nutrient Rich Soil Improver (0.5 Litre)
- Price
- £5.86
- Rating
- 4.2/5
- Reviews
- 3
- Age
- 2mo ago

Elixir Gardens | 100% Organic Worm Castings Vermi Compost/Fertiliser/Soil Improver | 2 Litres - 400 Litres Available | 6ltr Bag
- Price
- £8.20
- Rating
- 4.5/5
- Reviews
- 120
- Age
- 10y ago

Growcery Living Soil Mix with Mycorrhizal Fungi Worm Castings & Activated Biochar Bioactive Potting Soil for Houseplants & Garden Plants (1L)
- Price
- £6.62
- Rating
- 4.3/5
- Reviews
- 38
- Age
- 4mo ago

Baltic Worm Worm Castings 5 Liter - Pure Multipurpose Fertiliser Vermicompost - Natural Top Soil Builder and Improver Plant Feed for Potting Germination Growing
- Price
- £16.48
- Rating
- 4.6/5
- Reviews
- 1,245
- Age
- 9y ago

Black Gold Worm Castings 100% Organic Microbe-Rich Fertiliser Improves Soil Retains Moisture & Boosts Growth For Houseplants Gardens & Lawns (5 Litre)
- Price
- £11.93
- Rating
- 4.1/5
- Reviews
- 43
- Age
- 10mo ago
Newest
by launch date
Plantalaya Worm Castings Organic Soil Booster & Natural Plant Food Premium Earthworm Casting Nutrient Rich Soil Improver (0.5 Litre)
- Price
- £5.86
- Rating
- 4.2/5
- Reviews
- 3
- Age
- 2mo ago

Growcery Living Soil Mix with Mycorrhizal Fungi Worm Castings & Activated Biochar Bioactive Potting Soil for Houseplants & Garden Plants (1L)
- Price
- £6.62
- Rating
- 4.3/5
- Reviews
- 38
- Age
- 4mo ago

Black Gold Worm Castings Bucket | 100% Worm Castings for Mixing or Topdressing | Pots Gardens & Raised Beds | Supports Microbial Activity & Root Health (10L)
- Price
- £13.29
- Rating
- 4.1/5
- Reviews
- 11
- Age
- 9mo ago

Black Gold Worm Castings 100% Organic Microbe-Rich Fertiliser Improves Soil Retains Moisture & Boosts Growth For Houseplants Gardens & Lawns (5 Litre)
- Price
- £11.93
- Rating
- 4.1/5
- Reviews
- 43
- Age
- 10mo ago

Growcery Worm Castings - Premium Fertiliser for Plants Superior Soil Improver UK and Rich Vermicompost for Enhanced Plant Health and Vigour Fertiliser for plants outdoor and indoor (1L)
- Price
- £6.68
- Rating
- 4.6/5
- Reviews
- 96
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 68% of clicks. Leaders hold, but buyers still shop past them.
Brands
7 flat
Sellers
7
Est. top-5 brand share
92%
Top 20: 100%
Est. top-5 click share
68%
Top 20: 100%
Open market
3%
- Growcery32%
- Baltic Worm23%
- Invigortex21%
- Generic10%
- R&R SHOP6%
- Elixir Gardens5%
- Open — no brand owns it (1 brand, 3%)
Demand
Worm Castings search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Mar, Apr, May · busiest ÷ quietest = 3.1×
Search terms
Top Worm Castings search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- worm castings42K/yr
- worm castings for plants11K/yr
- vermicompost3K/yr
Reviews and returns
What reviews say buyers love and hate about Worm Castings
We read the reviews and the return reasons for every product selling here.
“Its to small”
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.
9 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Worm Castings 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









