Is ammonium sulfate profitable to sell on Amazon United States?

The niche generates $177K/yr across 23 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +87.4%. Flapen's verdict: Worth a look (66/100).

How competitive is the ammonium sulfate niche?

16 brands and 52 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 61% of demand.

What do buyers complain about in ammonium sulfate?

Top complaints mined from reviews: Plant Growth, Quality-Overall, Value For Money. The return rate is 0.4%.

When does demand for ammonium sulfate peak?

Demand peaks in Mar–Apr–May–Jun–Jul; the busiest month runs 7.0× the quietest.

What does it cost to enter the ammonium sulfate niche?

Listings span $9.63–$76.95; the average listing price is $30.14 (sweet spot $15–$100). The average incumbent carries 612 reviews — the moat a new listing must climb.

ammonium sulfate

Worth a look

Shows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Avg price

Incredible$30.14

avg listing price — sweet spot $15–$100

Price range

Great$9.63–$76.95

cheapest to priciest tracked listing — scored on the share inside $15–$100

Growth

Great+87.4%

90-day search growth — must beat 0% to launch

Brand share

Good61%

top-5 brand share — brands hold most of the demand

Review moat

Good612.22

avg incumbent reviews — the moat a new listing must climb

Conversion

Good4.8%

search→purchase rate — share of searches ending in a sale

Competition

Good54%

top-5 click share — leaders hold, buyers still browse

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay$177K

$177K/yr · 122K searches

Signals No Dominant Brand Low Review Barrier

According to Flapen's Amazon United States niche tracking, ammonium sulfate is a $177K/yr Amazon United States market (122K searches/yr). The top 5 brands hold 61% of demand. Demand peaks in Mar–Apr–May–Jun–Jul. Verdict: Worth a look — 66/100.

Data updated Jul 15, 2026 · scored weekly · How we score niches

ammonium sulfate market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $241K–$301K; units × avg price
Conversion rate: 4.8%
Avg BSR: #1,093
Page quality: 0%
Prime: 57%
Sponsored: 78%
Out of stock: 8.4%
Avg brand age: 71 months
Avg seller age: 154 days

Competition & brand share

The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

Top-5 brand share

61%

Top 20: 100%

Top-5 click share

54%

Top 20: 97%

Open market

33%

The Grow Co19%
CountryMax14%
Easy Peasy10%
Generic10%
Alpha Chemicals9%
Greenway Biotech, Inc.6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +87.4% search growth over the last 90 days.

Peak months: Mar, Apr, May, Jun, Jul · busiest ÷ quietest = 7.0×

Open Trend

Top ammonium sulfate search terms

ammonium sulfate57K/yr +113.1%5.7% conv.
ammonium sulfate fertilizer26K/yr +59.0%5.8% conv.
ammonium sulfate 21-0-0 fertilizer13K/yr +61.6%6.2% conv.
21-0-0 fertilizer6K/yr +73.8%6.0% conv.
ammonia sulfate5K/yr +132.3%5.0% conv.
ammonia sulfate fertilizer5K/yr +76.8%6.3% conv.
21-0-0 ammonium sulfate fertilizer4K/yr +38.5%5.7% conv.
ammonium sulfate 21-0-03K/yr +117.2%6.3% conv.
ammonia sulfate fertilizer 21-0-03K/yr +95.7%6.0% conv.

All search terms

Top ammonium 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 23 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Ammonium Sulfate 21-0-0 Fertilizer High Nitrogen for Rapid Plant Growth & Deep Green Color Ideal Soil Acidifier to Lower pH in Alkaline Soil 5 lb

The Grow Co$17.464.6★266 rev

Easy Peasy Plants Ammonium Sulfate - 21-0-0 24S Nutrient Plant Food Blend for DEEP Green Plants and Colorful Blooms - Great Fertilizer Soil Acidifier for Azaleas Blueberries Magnolia

Easy Peasy$19.014.6★379 rev

Generic$59.564.6★75 rev

CountryMax Ammonium Sulfate Fertilizer 21-0-0 10LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care

CountryMax$25.834.2★11 rev

Ammonium Sulfate - (NH4) 2SO4-1 Pound

Alpha Chemicals$9.634.6★337 rev

Newest

by launch date

CountryMax Ammonium Sulfate Fertilizer 21-0-0 10LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care

CountryMax$25.8311 rev

2mo ago

CountryMax Ammonium Sulfate Fertilizer 21-0-0 50LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care

CountryMax$61.7211 rev

2mo ago

Ammonium Sulfate 21-0-0 Fertilizer Lawn Fertilizers to Lower pH Level in Alkaline SOI High Nitrogen for Rapid Plant Growth & Deep Green Color (1 lb)

HOLEVINT$10.075 rev

6mo ago

Ammonium Sulfate 21-0-0 Fertilizer Water Soluble Ammonia Sulfate Fertilizer High Nitrogen 21-0-0 for Lawn Crops & Garden (1 LB)

CFUTABOH$9.964 rev

6mo ago

Minimalist Ammonium Sulfate Ideal for Gardening and Soil Enrichment Packaged for Convenience in a Refillable Bag (1 Pound)

Minimalist$11.6530 rev

1y ago

What buyers say about ammonium sulfate

What buyers praise and complain about, mined from review topics.

What buyers love

Plant Growth41%

“which is important for plant health”

Quality-Overall13%

“Quality remains consistent across applications”

Ease Of Use9%

“Easy to use”

Value For Money8%

“Good value”

Advertised Vs Actual Product8%

“Worked as advertised”

Color3%

“Color clean and clear”

Size-Overall2%

“Perfect size for my raised bed garden”

Instructions/User Manual/Troubleshooting2%

“Easy directions from one plant to large gardens”

Eco Friendliness1%

“also useful for many other household applications”

Weight Heavy1%

“Heavy producers”

What buyers complain about

Plant Growth21%

“I cant my garden this summer”

Quality-Overall13%

“I believe that there was a quality control concern with this batch”

Value For Money11%

“Not a good price for the amount”

Functionality-Overall7%

“Doesn't Work”

Color7%

“in 3 days youll see a color green that you didnt think was possible”

Instructions/User Manual/Troubleshooting6%

“No instructions included”

Advertised Vs Actual Product3%

“Misleading Weight – Not 4 lbs as Advertised”

Absorbency3%

“A week later the beads are sitting atop the soil, no absorption”

Natural Resource Wastage3%

“Total waste of money and time”

Flammable3%

“It burned my grass”

Top return reasons

Value For Money24%

Advertised Vs Actual Product20%

Functionality-Overall14%

Size-Overall13%

Leak-Proof10%

Contamination3%

Plant Growth3%

Defective Material/Parts2%

Color1%

Flammable1%

Common questions

Is ammonium sulfate profitable to sell on Amazon United States?: The niche generates $177K/yr across 23 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +87.4%. Flapen's verdict: Worth a look (66/100).
How competitive is the ammonium sulfate niche?: 16 brands and 52 sellers compete. The top 5 products take 54% of clicks and top 5 brands hold 61% of demand.
What do buyers complain about in ammonium sulfate?: Top complaints mined from reviews: Plant Growth, Quality-Overall, Value For Money. The return rate is 0.4%.
When does demand for ammonium sulfate peak?: Demand peaks in Mar–Apr–May–Jun–Jul; the busiest month runs 7.0× the quietest.
What does it cost to enter the ammonium sulfate niche?: Listings span $9.63–$76.95; the average listing price is $30.14 (sweet spot $15–$100). The average incumbent carries 612 reviews — the moat a new listing must climb.