aluminum sulfate
Worth a lookShows low returns (0.5%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.5%return rate — above 5% kills the launch gate
Growth
Incredible+133.8%90-day search growth — must beat 0% to launch
Avg price
Incredible$25.20avg listing price — sweet spot $15–$100
Review moat
Great373.19avg incumbent reviews — the moat a new listing must climb
Conversion
Great8.0%search→purchase rate — share of searches ending in a sale
Price range
Great$7.97–$117.45cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good69%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Market size
Okay$124K$124K/yr · 62K searches
According to Flapen's Amazon United States niche tracking, aluminum sulfate is a $124K/yr Amazon United States market (62K searches/yr). The top 5 brands hold 69% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 64/100.
Data updated Jul 15, 2026 · scored weekly · How we score niches
aluminum sulfate market data
- Units sold / yr
- 5K–6K
- avg 250–500/product
- Revenue / yr
- $126K–$151K
- units × avg price
- Conversion rate
- 8.0%
- Avg BSR
- #692
- Page quality
- 0%
- Prime
- 63%
- Sponsored
- 56%
- Out of stock
- 3.7%
- Avg brand age
- 84 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
13 falling
Sellers
47
Top-5 brand share
69%
Top 20: 100%
Top-5 click share
63%
Top 20: 100%
Open market
24%
- Hoffman25%
- Southern Ag17%
- Generic10%
- Hi-Yield9%
- PURE ORIGINAL INGREDIENTS9%
- Earth Science6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +133.8% search growth over the last 90 days.Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 5.4×
Top aluminum sulfate search terms
- aluminum sulfate48K/yr
- aluminum sulfate for plants6K/yr
- aluminum sulfate for pool4K/yr
- aluminum sulfate for soil3K/yr
Top aluminum sulfate 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 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Hoffman Blue Magic Aluminum Sulfate
Hoffman$19.624.6★276 rev
Southern Ag Aluminum Sulfate (Acidifies Soil) 5 LB Size: 5 LB
Southern Ag$18.704.6★294 rev
Aluminum Sulfate 5 lb.
Generic$18.875.0★2 rev
Earth Science Fast Acting Sulfur Granules 5lb Reduces Soil pH and Nutrient Runoff Improves Growth & Color for Acid-Loving Plants Long-Lasting Lawn Care Supplement
Earth Science$22.784.6★869 rev
Voluntary Purchasing Group Fertilome 32175 Aluminum Sulfate Soil Conditioner 4-Pound
ferti-lome$18.784.6★707 rev
Newest
by launch dateAluminum Sulfate 5 lb.
Generic$18.872 rev
Quick-Release Elemental Sulfur Soil Acidifier - Fertilizer for Hydrangeas Blueberries Citrus Roses Evergreens & More Aluminum Sulfate Alternative (8 oz - 0.5 lb.)
GARDENWISE$7.9736 rev
Aluminum Sulfate - High Purity | Industrial-Grade Multi-Purpose Water Treatment and Gardening Solution (500 Grams)
CCS CONSOLIDATED CHEMICAL & SOLVENTS$18.224 rev
Hi-Yield (34175) Aluminum Sulfate (3.25 lbs.)
Hi-Yield$17.1512 rev
Hi-Yield (34176) Aluminum Sulfate (10 lbs.)
Hi-Yield$34.014 rev
Trending
90-day click momentumAluminum Sulfate 5 lb.
Generic$18.875.0★
Ammonium Sulfate - (NH4) 2SO4-1 Pound
Alpha Chemicals$9.634.6★
Hi-Yield (34176) Aluminum Sulfate (10 lbs.)
Hi-Yield$34.014.4★
Quick-Release Elemental Sulfur Soil Acidifier - Fertilizer for Hydrangeas Blueberries Citrus Roses Evergreens & More Aluminum Sulfate Alternative (8 oz - 0.5 lb.)
GARDENWISE$7.974.3★
Pure Original Ingredients Aluminum Sulfate (4 oz) Iron Free Soil Additive
PURE ORIGINAL INGREDIENTS$10.504.5★
What buyers say about aluminum sulfate
What buyers praise and complain about, mined from review topics.What buyers love
“This has made a world of difference with my grass seed germinating”
“As advertised”
“I got the Blue color I was looking for”
“Good product”
“Great price”
“Pool clarifier usage”
“Perfect for reducing ph”
“Perfect size for my raised bed garden”
“It was the weight expected”
What buyers complain about
“Not a good price for the amount”
“My blueberry plant hasnt grown so maybe I need to keep waiting”
“I applied the substance to my Muddy Pond to clear it up it did not work of an aerating it with us 3,500 an hour pump for 3 days made no change”
“As advertised. This is not alum.”
“I didnt measure”
“Bag ripped and was not good quality”
Top return reasons
Common questions
- Is aluminum sulfate profitable to sell on Amazon United States?
- The niche generates $124K/yr across 16 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +133.8%. Flapen's verdict: Worth a look (64/100).
- How competitive is the aluminum sulfate niche?
- 13 brands and 47 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 69% of demand.
- What do buyers complain about in aluminum sulfate?
- Top complaints mined from reviews: Value For Money, Plant Growth, Functionality-Overall. The return rate is 0.5%.
- When does demand for aluminum sulfate peak?
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 5.4× the quietest.
- What does it cost to enter the aluminum sulfate niche?
- Listings span $7.97–$117.45; the average listing price is $25.20 (sweet spot $15–$100). The average incumbent carries 373 reviews — the moat a new listing must climb.