---
title: "Ammonium Sulfate — $177K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/ammonium-sulfate"
last_updated: "2026-08-09T09:04:19.069Z"
locale: en
meta:
description: "Niche score 66/100 · $177K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 66/100 · $177K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Ammonium Sulfate — $177K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 36Growth 86Conversion 57Competition 52Returns 98Price range 89Avg price 95Brand share 73Review moat 72Quality gap 43
**Returns**
**Incredible****0.4%**
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**
**Good****61%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Good****612.22**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****4.8%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Good****54%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$177K**
$177K/yr · 122K searches
**Signals**[** No Dominant Brand**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
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 ~~](https://flapen.com/research/methodology)
## **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**
**52**
**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.
5K3KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Apr, May, Jun, Jul · busiest ÷ quietest = 7.0×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/ammonium-sulfate/trend)
## **Top ammonium sulfate search terms**
- **ammonium sulfate**57K/yr+113.1%5.7% conv. - **ammonium sulfate fertilizer**26K/yr+59.0%5.8% conv. - **ammonium sulfate 21-0-0 fertilizer**13K/yr+61.6%6.2% conv. - **21-0-0 fertilizer**6K/yr+73.8%6.0% conv. - **ammonia sulfate**5K/yr+132.3%5.0% conv. - **ammonia sulfate fertilizer**5K/yr+76.8%6.3% conv. - **21-0-0 ammonium sulfate fertilizer**4K/yr+38.5%5.7% conv. - **ammonium sulfate 21-0-0**3K/yr+117.2%6.3% conv. - **ammonia sulfate fertilizer 21-0-0**3K/yr+95.7%6.0% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/ammonium-sulfate/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.
0%5%$9K10%$18K15%$26K20%$35K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$17.46**4.6★266 rev](https://www.amazon.com/dp/B0CN53ZV43) [2**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**$19.01**4.6★379 rev](https://www.amazon.com/dp/B0BVNSKBS9) [3**Dark Matter 21-0-0 Ammonium Sulfate Fertilizer | High-Nitrogen Lawn Garden & Turf Fertilizer | Fast-Acting Small Prill Formula | 40lbs | Covers up to 13 333 sq ft |**Generic**$59.56**4.6★75 rev](https://www.amazon.com/dp/B0DZ327Z13) [4**CountryMax Ammonium Sulfate Fertilizer 21-0-0 10LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care**CountryMax**$25.83**4.2★11 rev](https://www.amazon.com/dp/B0GXL8FPSL) [5**Ammonium Sulfate - (NH4) 2SO4-1 Pound**Alpha Chemicals**$9.63**4.6★337 rev](https://www.amazon.com/dp/B007ODPGB4)
**~~View all top sellers →~~**
### **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**$25.83**11 rev2mo ago](https://www.amazon.com/dp/B0GXL8FPSL) [**CountryMax Ammonium Sulfate Fertilizer 21-0-0 50LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care**CountryMax**$61.72**11 rev2mo ago](https://www.amazon.com/dp/B0GXL7JFHV) [**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**$10.07**5 rev6mo ago](https://www.amazon.com/dp/B0GF1X111P) [**Ammonium Sulfate 21-0-0 Fertilizer Water Soluble Ammonia Sulfate Fertilizer High Nitrogen 21-0-0 for Lawn Crops & Garden (1 LB)**CFUTABOH**$9.96**4 rev6mo ago](https://www.amazon.com/dp/B0GD4ZMS3Q) [**Minimalist Ammonium Sulfate Ideal for Gardening and Soil Enrichment Packaged for Convenience in a Refillable Bag (1 Pound)**Minimalist**$11.65**30 rev1y ago](https://www.amazon.com/dp/B0FGQFH7KR)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Ammonium Sulfate 21-0-0 Fertilizer Water Soluble Ammonia Sulfate Fertilizer High Nitrogen 21-0-0 for Lawn Crops & Garden (1 LB)**CFUTABOH**$9.96**4.7★**▲ 98%**](https://www.amazon.com/dp/B0GD4ZMS3Q) [**CountryMax Ammonium Sulfate Fertilizer 21-0-0 50LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care**CountryMax**$61.72**4.2★**▲ 97%**](https://www.amazon.com/dp/B0GXL7JFHV) [**CountryMax Ammonium Sulfate Fertilizer 21-0-0 10LB Bag High Nitrogen Lawn Fertilizer with Sulfur Plant Food for Grass Gardens Vegetables & Soil Care**CountryMax**$25.83**4.2★**▲ 97%**](https://www.amazon.com/dp/B0GXL8FPSL) [**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**$10.07**3.5★**▲ 58%**](https://www.amazon.com/dp/B0GF1X111P) [**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**$19.01**4.6★**▲ 57%**](https://www.amazon.com/dp/B0BVNSKBS9)
**~~View all trending →~~**
## **What buyers say about ammonium sulfate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Plant Growth**41%
*“which is important for plant health”*
**Quality-Overall**13%
*“Quality remains consistent across applications”*
**Ease Of Use**9%
*“Easy to use”*
**Value For Money**8%
*“Good value”*
**Advertised Vs Actual Product**8%
*“Worked as advertised”*
**Color**3%
*“Color clean and clear”*
**Size-Overall**2%
*“Perfect size for my raised bed garden”*
**Instructions/User Manual/Troubleshooting**2%
*“Easy directions from one plant to large gardens”*
**Eco Friendliness**1%
*“also useful for many other household applications”*
**Weight Heavy**1%
*“Heavy producers”*
### **What buyers complain about **
**Plant Growth**21%
*“I cant my garden this summer”*
**Quality-Overall**13%
*“I believe that there was a quality control concern with this batch”*
**Value For Money**11%
*“Not a good price for the amount”*
**Functionality-Overall**7%
*“Doesn't Work”*
**Color**7%
*“in 3 days youll see a color green that you didnt think was possible”*
**Instructions/User Manual/Troubleshooting**6%
*“No instructions included”*
**Advertised Vs Actual Product**3%
*“Misleading Weight – Not 4 lbs as Advertised”*
**Absorbency**3%
*“A week later the beads are sitting atop the soil, no absorption”*
**Natural Resource Wastage**3%
*“Total waste of money and time”*
**Flammable**3%
*“It burned my grass”*
### **Top return reasons **
**Value For Money**24%
**Advertised Vs Actual Product**20%
**Functionality-Overall**14%
**Size-Overall**13%
**Leak-Proof**10%
**Contamination**3%
**Plant Growth**3%
**Defective Material/Parts**2%
**Color**1%
**Flammable**1%
## **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.
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