---
title: "Fish Fertilizer for Plants — $1.5M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/fish-fertilizer-for-plants"
last_updated: "2026-08-09T02:03:24.555Z"
locale: en
meta:
description: "Niche score 65/100 · $1.5M/yr market · 664K searches/yr · $21.90 avg price. Clears our launch bar. Data updated Jul 2026."
"og:description": "Niche score 65/100 · $1.5M/yr market · 664K searches/yr · $21.90 avg price. Clears our launch bar. Data updated Jul 2026."
"og:title": "Fish Fertilizer for Plants — $1.5M/yr Amazon US Niche (2026) - Flapen"
---
# **fish fertilizer for plants**
**Launch it**
A $1.5M/yr market growing +155.3% this quarter with returns at 0.3% — clears our launch bar.
Market size 86Growth 96Conversion 88Competition 20Returns 99Price range 82Avg price 92Brand share 23Review moat 41Quality gap 23
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Growth**
**Incredible****+155.3%**
90-day search growth — must beat 0% to launch
**Avg price**
**Great****$21.90**
avg listing price — sweet spot $15–$100
**Conversion**
**Great****10.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Great****$1.5M**
$1.5M/yr · 664K searches
**Price range**
**Great****$10.15–$40.30**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,417**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United States niche tracking, fish fertilizer for plants is a $1.5M/yr Amazon United States market (664K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Launch it — 65/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fish fertilizer for plants market data**
- **Units sold / yr**
- **60K–80K**
- avg 4,000–5,000/product
- **Revenue / yr**
- **$1.3M–$1.8M**
- units × avg price
- **Conversion rate**
- **10.3%**
- **Avg BSR**
- **#408**
- **Page quality**
- **0%**
- **Prime**
- **92%**
- **Sponsored**
- **92%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **90 months**
- **Avg seller age**
- **145 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**111**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**5%**
- Alaska45% - TPS NUTRIENTS19% - Bloom City11% - Neptune's Harvest10% - The Grow Co6% - Lilly Miller4% - Open — no brand owns it (2 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 102 weeks — +155.3% search growth over the last 90 days.
30K20KSpike '25Spike '26 seasonDecMarJunAugNovMarMay
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 8.5×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/fish-fertilizer-for-plants/trend)
## **Top fish fertilizer for plants search terms**
- **fish fertilizer**123K/yr+201.3%6.3% conv. - **fish emulsion fertilizer**124K/yr+148.8%11.5% conv. - **fish fertilizer for plants**129K/yr+101.3%7.1% conv. - **alaska fish fertilizer**93K/yr+235.7%8.3% conv. - **fish emulsion**42K/yr+104.8%9.7% conv. - **fish fertilizer for vegetables**24K/yr+237.7%7.4% conv. - **alaskan fish fertilizer**24K/yr+229.8%9.1% conv. - **alaska fish fertilizer 5-1-1**18K/yr+106.7%11.3% conv. - **fish fertilizer for vegetable garden**10K/yr+365.1%7.8% conv. - **fish emulsion fertilizer organic**13K/yr+139.4%11.6% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/fish-fertilizer-for-plants/search-terms)
## **Top fish fertilizer for plants 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%$225K30%$450K45%$675K60%$901K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Alaska Fish Fertilizer OMRI Listed 5-1-1**Alaska**$26.61**4.7★886 rev](https://www.amazon.com/dp/B0DQ2LNX35) [2**Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz**TPS NUTRIENTS**$11.89**4.6★309 rev](https://www.amazon.com/dp/B0DQR1X69R) [3**Organic Wild Fish Fertilizer and Plant Supplement Great for Roots and Soil Made from Sustainable Salmon by Bloom City 1/2 Pint (8 oz)**Bloom City**$11.44**4.6★1,694 rev](https://www.amazon.com/dp/B08JHDKVHC) [4**1 Gallon Organic Fish Emulsion Fertilizer for Plants - Ideal Liquid Fish Fertilizer for Plants Flowers Fruits & Vegetables 2-3-1 NPK - Sustainably Sourced and Hydrolyzed for Steady Growth**The Grow Co**$29.92**4.7★619 rev](https://www.amazon.com/dp/B09FZTPQJL) [5**Lilly Miller Alaska Fish Fertilizer 5-1-1 Concentrate 1 Quart (2-Pack)**Lilly Miller**$28.41**4.7★819 rev](https://www.amazon.com/dp/B07D8ZP34L)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Alaska Fish Fertilizer OMRI Listed 5-1-1**Alaska**$26.61**886 rev1y ago](https://www.amazon.com/dp/B0DQ2LNX35) [**Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz**TPS NUTRIENTS**$11.89**309 rev1y ago](https://www.amazon.com/dp/B0DQR1X69R) [**Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz**TPS NUTRIENTS**$10.15**53 rev1y ago](https://www.amazon.com/dp/B0DQRM621V) [**Organic Wild Fish Fertilizer and Plant Supplement Great for Roots and Soil Made from Sustainable Salmon by Bloom City 1/2 Pint (8 oz)**Bloom City**$11.44**1,694 rev4y ago](https://www.amazon.com/dp/B08JHDKVHC) [**1 Gallon Organic Fish Emulsion Fertilizer for Plants - Ideal Liquid Fish Fertilizer for Plants Flowers Fruits & Vegetables 2-3-1 NPK - Sustainably Sourced and Hydrolyzed for Steady Growth**The Grow Co**$29.92**619 rev4y ago](https://www.amazon.com/dp/B09FZTPQJL)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Fish Fertilizer Liquid Fish Supplement for Lush Growth Deep Green Leaves & Strong Roots 8 oz**TPS NUTRIENTS**$10.15**4.3★**▲ 39%**](https://www.amazon.com/dp/B0DQRM621V) [**Organic Wild Fish Fertilizer and Plant Supplement Great for Roots and Soil Made from Sustainable Salmon by Bloom City Quart (32 oz)**Bloom City**$18.51**4.6★**▲ 28%**](https://www.amazon.com/dp/B077NM2JSB) [**Lilly Miller Alaska Fish Fertilizer 5-1-1 Concentrate 1 Quart (2-Pack)**Lilly Miller**$28.41**4.7★**▲ 21%**](https://www.amazon.com/dp/B07D8ZP34L) [**Fish Emulsion Fertilizer Liquid Salmon Supplement for Fast Nutrient Uptake Lush Green Growth & Stronger Roots 8 oz**TPS NUTRIENTS**$11.89**4.6★**▲ 11%**](https://www.amazon.com/dp/B0DQR1X69R) [**Neptunes Harvest Fish & Seaweed Liquid Fertilizer (2-3-1) - 18oz Pint - Plant Food for Garden - Indoor & Outdoor Organic Plant Fertilizer for Vegetables Flowers Fruit Trees & Lawns**Neptune's Harvest**$17.99**4.7★**— 8%**](https://www.amazon.com/dp/B009HLVIY0)
**~~View all trending →~~**
## **What buyers say about fish fertilizer for plants**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Plant Growth**51%
*“This product really helped my plants grow”*
**Smell**10%
*“Smell was not bad”*
**Quality-Overall**7%
*“* Excellent gentle organic nitrogen source for steady growth”*
**Ease Of Use**5%
*“Easy to use”*
**Value For Money**5%
*“its so worth it”*
**Advertised Vs Actual Product**4%
*“As advertised”*
**Strength**3%
*“Highly effective”*
**Color**0%
*“My garden thanks me with vibrant colors”*
**Durability**0%
*“Lasts well”*
**Size-Overall**0%
*“Good value for the bottle size”*
### **What buyers complain about **
**Smell**41%
*“Nasty smell”*
**Leak-Proof**11%
*“Arrived leaking”*
**Size-Overall**2%
*“Beware of how small this is”*
**Plant Growth**2%
*“Didnt provide any benefit to my plants”*
**Hard Feel**2%
*“Stinky”*
**Contamination**2%
*“Can burn plants if not diluted enough, be cautious, more is not better”*
**Ease Of Cleaning**2%
*“can create a mess”*
**Value For Money**1%
*“Bad value”*
**Suitable For Indoor**1%
*“Not for indoor plants”*
**Product Condition**1%
*“Looked like part of it has been used”*
### **Top return reasons **
**Leak-Proof**48%
**Smell**17%
**Value For Money**7%
**Size-Overall**7%
**Advertised Vs Actual Product**5%
**Functionality-Overall**3%
**Product Condition**2%
**Defective Material/Parts**2%
**Contamination**2%
**Plant Growth**1%
## **Common questions**
- **Is fish fertilizer for plants profitable to sell on Amazon United States?**
- The niche generates $1.5M/yr across 13 tracked products. 90-day search growth is +155.3%. Flapen's verdict: Launch it (65/100).
- **How competitive is the fish fertilizer for plants niche?**
- 8 brands and 111 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in fish fertilizer for plants?**
- Top complaints mined from reviews: Smell, Leak-Proof, Size-Overall. The return rate is 0.3%.
- **When does demand for fish fertilizer for plants peak?**
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 8.5× the quietest.
- **What does it cost to enter the fish fertilizer for plants niche?**
- Listings span $10.15–$40.30; the average listing price is $21.90 (sweet spot $15–$100). The average incumbent carries 2,417 reviews — the moat a new listing must climb.
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