Worm Castings
MaybeAn estimated 0.2% of orders come back. But the products selling today already average 4.7★, so Worm Castings is a Maybe.
- Flapen Score
- 62 / 100Top 25% of 8,839 Patio, Lawn & Garden niches · +6 vs the category median of 5662
- Market size
- $2.0M/yr959K searches / yr
- 90-day growth
- +8.3%search demand this quarter
- Competition
- 54%top-5 click share · 14 brands · 35 sellers
Flapen Score
Worm Castings against its category
The dotted line is the Patio, Lawn & 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 States searched for Worm Castings 959K times last year and spent an estimated $2.0M. The top 5 brands take 83% of clicks. Demand peaks in Mar–Apr–May. Flapen scores it 62 out of 100, a Maybe.
01 · Demand
An estimated 9.2% of those searches ended in a purchase.
Shoppers searched for this 959K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.2% of those searches ended in a purchase. Searches in the last 90 days moved +8.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $2.0M a year.
- Searches, last 12 months
- 959K
- Growth, 90 days vs prior 90
- +8.3%
- Conversion, latest week
- 9.2%
- Market size, estimated
- $2.0Ma year
- Peak month
- April3.3× the quietest month
- Top search term
- worm castings490K searches a year
02 · Price
A sale here is worth $22.07.
Listings sell for $22.07 on average, from $7.50 to $67.40. Amazon reports units sold in ranges. This niche sold 80K to 100K a year. The average listing sells 4,000 to 5,000 of them. At $22.07 that is $88K to $110K a year per listing.
- Average price
- $22.07inside the $15 to $100 sweet spot
- Price range
- $7.50–$67.40
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 80K–100K
- Units per listing a year
- 4,000–5,000
- Revenue per listing a year
- $88K–$110K
- Returns
- 0.2%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
89% of listings pay for placement with sponsored ads. 67% ship with Prime. On an average day, 4.9% of listings are out of stock. The average listing ranks #479 within Soils, Mulches & Planting Media. It carries 1,936 reviews at 4.70 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 89%
- Prime listings
- 67%
- Out of stock, average day
- 4.9%
- Average rank
- #479in Soils, Mulches & Planting Media
- Average rating
- 4.70 starsAmazon United States average 4.42 stars
- Average reviews
- 1,936per listing
- Listings tracked
- 27
04 · Newcomers
1 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 65 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 65 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 15, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Brut Organic Worm Castings for Plants 5 LB Natural Nutrients Fertility Builder Plant Food for Potting Soil and Garden Soil Indoor and Outdoor Use
- Price
- $15.44
- Rating
- 4.8/5
- Reviews
- 5,828
- Age
- 5y ago

Wiggle Worm 100% Pure Organic Mineral-Dense Worm Castings Fertilizer 30lbs - Improves Soil Fertility and Aeration for Growing Better Houseplants Vegetables and More
- Price
- $34.24
- Rating
- 4.8/5
- Reviews
- 1,817
- Age
- 6y ago

Back to the Roots Organic Worm Castings for Plants Natural Fertilizer and Soil Enhancer for Gardening Made in the USA 5lb
- Price
- $14.87
- Rating
- 4.8/5
- Reviews
- 906
- Age
- 2y ago

Wiggle Worm 100% Pure Worm Castings Plus Worm Egg Material 40lbs - Fertilizer and Soil Amendment for Indoor and Outdoor Gardening to Improve Soil Fertility and Aeration - 100% Organic and Odor Free
- Price
- $41.54
- Rating
- 4.6/5
- Reviews
- 984
- Age
- 3y ago

Brut Organic Worm Castings for Plants 12 LB Natural Nutrients Fertility Builder Plant Food for Potting Soil and Garden Soil Indoor and Outdoor Use
- Price
- $24.11
- Rating
- 4.8/5
- Reviews
- 5,828
- Age
- 5y ago
Trending
estimated 90-day click momentum
Earth Science Earthworm Castings Premium Plant Fertilizer for Indoor & Outdoor Plants Soil Enhancer for Vegetable Gardens 4lb
- Price
- $7.50
- Rating
- 4.8/5
- Reviews
- 173
- Age
- 5y ago

Arcadia Garden Products Worm Nerd Worm Castings Natural Soil Additive for Lawns Gardening and Potted Plants 3 Quarts Black (WN05) -Cannot Ship to Hawaii-
- Price
- $10.75
- Rating
- 4.7/5
- Reviews
- 261
- Age
- 4y ago

20 oz 100% Organic Worm Castings Natural Superfood for Plant Growth Root Development & Growing Healthier Stronger Crops Non Toxic & Kind to Soil Resealable Zip Pouch Life Cycle Organics
- Price
- $10.33
- Rating
- 4.8/5
- Reviews
- 55
- Age
- 3y ago

Earth Science RevitaSoil 4lb Up to 16 Sq. Ft. - Premium Organic Soil Revitalizer - Natural Nutrients & Earthworm Castings Grow Up to 3X More Indoor & Outdoor Plants Vegetables Flowers Gardens
- Price
- $23.72
- Rating
- 4.4/5
- Reviews
- 108
- Age
- 1y ago

Earth Science Earthworm Castings 3 lbPremium Plant Fertilizer for Indoor & Outdoor Plants Soil Enhancer for Vegetable Gardens
- Price
- $18.91
- Rating
- 4.9/5
- Reviews
- 185
- Age
- 3y ago
Newest
by launch date
Wrigglebrew Organic Liquid Fertilizer Concentrate from Worm Castings. Non-toxic All-Purpose Plant Food for Gardens Vegetables Fruits Houseplants Seed Starters and Ornamentals. (16 Fluid Ounces)
- Price
- $10.00
- Rating
- 4.2/5
- Reviews
- 174
- Age
- 12mo ago

Earth Science RevitaSoil 4lb Up to 16 Sq. Ft. - Premium Organic Soil Revitalizer - Natural Nutrients & Earthworm Castings Grow Up to 3X More Indoor & Outdoor Plants Vegetables Flowers Gardens
- Price
- $23.72
- Rating
- 4.4/5
- Reviews
- 108
- Age
- 1y ago

Worm Castings for Plants 1 QT (1.5lbs). Organic Soil Rebuilder and Plant Fertilizer.
- Price
- $11.62
- Rating
- 4.9/5
- Reviews
- 40
- Age
- 1y ago

Back to the Roots Organic Worm Castings for Plants Natural Fertilizer and Soil Enhancer for Gardening Made in the USA 5lb
- Price
- $14.87
- Rating
- 4.8/5
- Reviews
- 906
- Age
- 2y ago

20 oz 100% Organic Worm Castings Natural Superfood for Plant Growth Root Development & Growing Healthier Stronger Crops Non Toxic & Kind to Soil Resealable Zip Pouch Life Cycle Organics
- Price
- $10.33
- Rating
- 4.8/5
- Reviews
- 55
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 54% of clicks. Leaders hold, but buyers still shop past them.
Brands
14 rising
Sellers
35
Est. top-5 brand share
83%
Top 20: 97%
Est. top-5 click share
54%
Top 20: 92%
Open market
14%
- Wiggle Worm28%
- BRUT WORM FARMS27%
- plantonix13%
- Back to the Roots10%
- Earth Science5%
- --3%
- Open — no brand owns it (8 brands, 14%)
Demand
Worm Castings search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Mar, Apr, May · busiest ÷ quietest = 3.3×
Search terms
Top Worm Castings search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- worm castings490K/yr
- worm castings for gardening82K/yr
- earthworm castings75K/yr
- worm castings for plants105K/yr
- humus de lombriz para plantas38K/yr
- worm casting36K/yr
- wiggle worm castings14K/yr
- worm castings organic fertilizer16K/yr
- organic worm castings15K/yr
- humus de lombriz13K/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.
“Poor quality control, apparently”
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.
15 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









