---
title: "Rock Phosphate — $45K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/rock-phosphate"
last_updated: "2026-08-10T11:07:02.500Z"
locale: en
meta:
description: "Niche score 40/100 · $45K/yr market · 33K searches/yr · $22.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 40/100 · $45K/yr market · 33K searches/yr · $22.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Rock Phosphate — $45K/yr Amazon US Niche (2026) - Flapen"
---
# **rock phosphate**
**Skip it**
A small market ($45K/yr) — this niche doesn't clear our bar today.
Market size 11Growth 31Conversion 65Competition 12Returns 98Price range 84Avg price 95Brand share 14Review moat 66Quality gap 19
**Returns**
**Incredible****0.4%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$22.86**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$11.06–$39.49**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****861.6**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****5.9%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Okay****+4.7%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Bad****94%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****85%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****$45K**
$45K/yr · 33K searches
According to Flapen's Amazon United States niche tracking, rock phosphate is a $45K/yr Amazon United States market (33K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in Mar–Apr–May. Verdict: Skip it — 40/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rock phosphate market data**
- **Units sold / yr**
- **3K–4K**
- avg 250–500/product
- **Revenue / yr**
- **$69K–$91K**
- units × avg price
- **Conversion rate**
- **5.9%**
- **Avg BSR**
- **#1,284**
- **Page quality**
- **0%**
- **Prime**
- **70%**
- **Sponsored**
- **70%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **98 months**
- **Avg seller age**
- **163 days**
## **Competition & brand share**
The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **—flat
**Sellers**
**35**
**Top-5 brand share**
**94%**
Top 20: 100%
**Top-5 click share**
**85%**
Top 20: 100%
**Open market**
**2%**
- Espoma57% - Down To Earth All Natural Fertilizers20% - Lancaster Agriculture Products7% - The Grow Co6% - Easy Peasy4% - OULLYY3% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +4.7% search growth over the last 90 days.
1K750Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Apr, May · busiest ÷ quietest = 4.9×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/rock-phosphate/trend)
## **Top rock phosphate search terms**
- **rock phosphate**19K/yr+8.8%10.0% conv. - **rock phosphate organic fertilizer**9K/yr+0.3%9.4% conv. - **rock phosphate fertilizer**3K/yr+25.5%6.6% conv. - **soft rock phosphate**3K/yr-22.6%6.2% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/rock-phosphate/search-terms)
## **Top rock phosphate 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%15%$7K30%$13K45%$20K60%$27K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 10 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Espoma Rock Phosphate 7.25 lb Organic Plant Fertilizer for Outdoor Flower Or Vegetable Gardens Promotes Blooming & Root Growth for Use On All Plants**Espoma**$20.64**4.8★1,391 rev](https://www.amazon.com/dp/B0063ZDTPY) [2**Down To Earth All Natural Fertilizers Organic Rock Phosphate - Calcium Phosphate Plant Food for Flower Beds and Vegetable Gardens 0-3-0 5 lb**Down To Earth All Natural Fertilizers**$20.65**4.8★1,222 rev](https://www.amazon.com/dp/B07DLSXGN3) [3**Espoma RP28 Rock Phosphate 28lb Organic Plant Fertilizer! for Outdoor Flower Or Vegetable Gardens Promotes Blooming & Root Growth for Use On All Plants**Espoma**$39.49**4.6★388 rev](https://www.amazon.com/dp/B003B59Q1A) [4**Triple Super Phosphate 0-46-0 Fertilizer high Phosphorus Fertilizer Stronger Roots & Flower Formation Ideal Super Phosphate for Plants - Flowers Fruits Vegetables & Turf 5 lb**The Grow Co**$18.33**4.6★418 rev](https://www.amazon.com/dp/B0CN53M7LT) [5**TRIPLE SUPER PHOSPHATE FERTILIZER 0-46-0 | phosphorus fertilizer for gardens lawns indoor and outdoor plants | ROCK PHOSPHATE PLANT FOOD FERTILIZER FOR ORCHIDS WISTERIA CACTUS AND ALL OTHER PLANTS**Easy Peasy**$19.03**4.6★3,815 rev](https://www.amazon.com/dp/B075BY4GSF)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Brown Rock Phosphate 20 Pounds for Vegetable Gardens Lawns and Orchards. Enhances Soil Quality and Supports Vigorous Plant Growth by Lancaster Agriculture Products**Lancaster Agriculture Products**$36.79**14 rev1y ago](https://www.amazon.com/dp/B0DV7XN59P) [**Soft Rock Phosphate (0-3-0) 5 Pounds Organic Fertilizer with Calcium & Minerals Long-Lasting Soil Benefits for Vibrant Plants by Lancaster Agriculture Products**Lancaster Agriculture Products**$22.94**14 rev1y ago](https://www.amazon.com/dp/B0DY2T7NC5) [**Triple Super Phosphate Fertilizer Phosphorus Plant Food for Plants and Flower Gardens (1.9 Pounds)**OULLYY**$11.06**36 rev1y ago](https://www.amazon.com/dp/B0D9WHBBD1) [**Triple Super Phosphate 0-46-0 Fertilizer high Phosphorus Fertilizer Stronger Roots & Flower Formation Ideal Super Phosphate for Plants - Flowers Fruits Vegetables & Turf 5 lb**The Grow Co**$18.33**418 rev2y ago](https://www.amazon.com/dp/B0CN53M7LT) [**Triple Super Phosphate 0-46-0 Fertilizer - Made in USA - Bloom Booster - TSP Pure Phosphorus Plant Food for Indoor/Outdoor Plants and Flower Gardens - Fruit Vegetables Holistic Herbs Trees & More!**Cz Garden Supply**$17.58**658 rev4y ago](https://www.amazon.com/dp/B07L95RCWF)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Triple Super Phosphate Fertilizer Phosphorus Plant Food for Plants and Flower Gardens (1.9 Pounds)**OULLYY**$11.06**4.8★**▲ 48%**](https://www.amazon.com/dp/B0D9WHBBD1) [**Triple Super Phosphate 0-46-0 Fertilizer high Phosphorus Fertilizer Stronger Roots & Flower Formation Ideal Super Phosphate for Plants - Flowers Fruits Vegetables & Turf 5 lb**The Grow Co**$18.33**4.6★**▲ 24%**](https://www.amazon.com/dp/B0CN53M7LT) [**Brown Rock Phosphate 20 Pounds for Vegetable Gardens Lawns and Orchards. Enhances Soil Quality and Supports Vigorous Plant Growth by Lancaster Agriculture Products**Lancaster Agriculture Products**$36.79**4.7★**▲ 12%**](https://www.amazon.com/dp/B0DV7XN59P) [**Triple Super Phosphate 0-46-0 Fertilizer - Made in USA - Bloom Booster - TSP Pure Phosphorus Plant Food for Indoor/Outdoor Plants and Flower Gardens - Fruit Vegetables Holistic Herbs Trees & More!**Cz Garden Supply**$17.58**4.7★**— 6%**](https://www.amazon.com/dp/B07L95RCWF) [**Espoma Rock Phosphate 7.25 lb Organic Plant Fertilizer for Outdoor Flower Or Vegetable Gardens Promotes Blooming & Root Growth for Use On All Plants**Espoma**$20.64**4.8★**— 5%**](https://www.amazon.com/dp/B0063ZDTPY)
**~~View all trending →~~**
## **What buyers say about rock phosphate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Plant Growth**43%
*“Keep your plants healthy”*
**Quality-Overall**17%
*“Quality product”*
**Advertised Vs Actual Product**11%
*“So far the results are as advertised”*
**Value For Money**11%
*“Good value for cost”*
**Ease Of Use**4%
*“Easy to use”*
**Instructions/User Manual/Troubleshooting**4%
*“Follow instructions”*
**Color**2%
*“is very green”*
**Strength**1%
*“Sturdy & roots are big & healthy”*
### **What buyers complain about **
**Quality-Overall**20%
*“Poor quality control”*
**Smell**10%
*“smelling like cheese so my Dog swipes a mouthful as I opened the box”*
**Flexibility**10%
*“Not versatile”*
**Advertised Vs Actual Product**10%
*“Dont mean to sound like an advertisement”*
**Ease Of Use**10%
*“Not easy to use”*
**Size-Overall**7%
*“Huge roots”*
### **Top return reasons **
**Advertised Vs Actual Product**24%
**Leak-Proof**21%
**Defective Material/Parts**12%
**Value For Money**12%
**Functionality-Overall**9%
**Size-Overall**8%
**Weight Heavy**2%
**Moist/Dry**2%
**Plant Growth**2%
**Measurement/Reading Accuracy**2%
## **Common questions**
- **Is rock phosphate profitable to sell on Amazon United States?**
- The niche generates $45K/yr across 10 tracked products. 90-day search growth is +4.7%. Flapen's verdict: Skip it (40/100).
- **How competitive is the rock phosphate niche?**
- 7 brands and 35 sellers compete. The top 5 products take 85% of clicks and top 5 brands hold 94% of demand.
- **What do buyers complain about in rock phosphate?**
- Top complaints mined from reviews: Quality-Overall, Smell, Flexibility. The return rate is 0.4%.
- **When does demand for rock phosphate peak?**
- Demand peaks in Mar–Apr–May; the busiest month runs 4.9× the quietest.
- **What does it cost to enter the rock phosphate niche?**
- Listings span $11.06–$39.49; the average listing price is $22.86 (sweet spot $15–$100). The average incumbent carries 862 reviews — the moat a new listing must climb.
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