---
title: "Monopotassium Phosphate — $93K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/monopotassium-phosphate"
last_updated: "2026-08-11T10:20:48.675Z"
locale: en
meta:
description: "Niche score 56/100 · $93K/yr market · 44K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 56/100 · $93K/yr market · 44K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Monopotassium Phosphate — $93K/yr Amazon US Niche (2026) - Flapen"
---
# **monopotassium phosphate**
**Worth a look**
Shows demand growing +209.4% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 23Growth 98Conversion 67Competition 20Returns 97Price range 92Avg price 95Brand share 35Review moat 63Quality gap 24
**Growth**
**Incredible****+209.4%**
90-day search growth — must beat 0% to launch
**Returns**
**Incredible****0.6%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$35.06**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$11.85–$98.35**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.1%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****962.58**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****84%**
top-5 brand share — brands hold most of the demand
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$93K**
$93K/yr · 44K searches
**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)") [** 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, monopotassium phosphate is a $93K/yr Amazon United States market (44K searches/yr). The top 5 brands hold 84% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 56/100.
Data updated Jul 15, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **monopotassium phosphate market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$70K–$88K**
- units × avg price
- **Conversion rate**
- **6.1%**
- **Avg BSR**
- **#1,773**
- **Page quality**
- **0%**
- **Prime**
- **75%**
- **Sponsored**
- **42%**
- **Out of stock**
- **5.3%**
- **Avg brand age**
- **83 months**
- **Avg seller age**
- **151 days**
## **Competition & brand share**
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**9 **▼falling
**Sellers**
**10**
**Top-5 brand share**
**84%**
Top 20: 100%
**Top-5 click share**
**76%**
Top 20: 100%
**Open market**
**10%**
- Prevegenics54% - Humboldts Secret9% - NilocG Aquatics8% - Generic7% - Greenway Biotech, Inc.6% - Boca Hydro6% - Open — no brand owns it (3 brands, 10%)
## **Demand & seasonality**
Weekly Amazon search volume, last 54 weeks — +209.4% search growth over the last 90 days.
2K2KSpike '26 seasonJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: May, Jun, Jul · busiest ÷ quietest = 6.0×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/monopotassium-phosphate/trend)
## **Top monopotassium phosphate search terms**
- **mkp fertilizer**10K/yr+396.4%7.0% conv. - **monopotassium phosphate**12K/yr+121.4%5.5% conv. - **mkp fertilizer 0-52-34**3K/yr>1,000%7.6% conv. - **monopotassium phosphate fertilizer**4K/yr+232.7%7.0% conv. - **potassium dihydrogen phosphate**6K/yr+83.3%2.1% conv. - **mkp**5K/yr+89.1%5.4% conv. - **monopotassium**2K/yr+201.5%0.3% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/monopotassium-phosphate/search-terms)
## **Top monopotassium 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%$14K30%$28K45%$42K60%$56K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)2 products missing review or click data not plotted
All 12 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Monopotassium Phoshpate (MKP) Fertilizer | Highly Water Soluble | 0-52-34 (1 Pound)**Prevegenics**$15.71**4.6★172 rev](https://www.amazon.com/dp/B09BNW2Z5K) [2**Monopotassium Phoshpate (MKP) Fertilizer 0-52-34 | Highly Water Soluble | Supports Strong Root Development & Flowering | Enhances Flower Formation & Fruit Production | (5 Pounds)**Prevegenics**$39.50**4.5★134 rev](https://www.amazon.com/dp/B09BNWDMH3) [3**Pure Monopotassium Phosphate (MKP) Fertilizer 05234 WaterSoluble 5 lbs**NilocG Aquatics**$34.93**4.6★14 rev](https://www.amazon.com/dp/B0FF2WF45B) [4**Monopotassium Phosphate MKP 0-52-34 Highest Purity Haifa Grade Water Soluble Plant Nutrient Bloom Booster 2 lb**Generic**$19.95**5.0★4 rev](https://www.amazon.com/dp/B098NS3ZS9) [5**Greenway Biotech Inc. Monopotassium Phosphate Fertilizer 0-52-34-100% Water Soluble Hydroponics for Root Strength - Increase Yield and Blooming - High Purity Plant Nutrient Formula - 1 Pound**Greenway Biotech, Inc.**$33.64**4.6★603 rev](https://www.amazon.com/dp/B00HCS44LY)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Boca Hydro MKP 0-52-34 Mono Potassium Phosphate Hydroponic Grade Water Soluble Fertilizer Bloom Booster Flowering Enhancer Root Builder for Hydroponics Soil Fertigation Vegetables Trees (1 Lb)**Boca Hydro**$18.00**0 rev2mo ago](https://www.amazon.com/dp/B0GZ8QK1QT) [**Boca Hydro MKP 0-52-34 Mono Potassium Phosphate Hydroponic Grade Water Soluble Fertilizer Bloom Booster Flowering Enhancer Root Builder for Hydroponics Soil Fertigation Vegetables Trees (5 Lb)**Boca Hydro**$48.76**0 rev2mo ago](https://www.amazon.com/dp/B0GZ885W35) [**Monopotassium Phosphate MKP 0-52-34 Highest Purity Haifa Grade Water Soluble Plant Nutrient Bloom Booster 2 lb**Generic**$19.95**4 rev4mo ago](https://www.amazon.com/dp/B098NS3ZS9) [**Pure Monopotassium Phosphate (MKP) Fertilizer 05234 WaterSoluble 5 lbs**NilocG Aquatics**$34.93**14 rev1y ago](https://www.amazon.com/dp/B0FF2WF45B) [**Monopotassium Phosphate Fertilizer MKP 0-52-34 from Plantco | Promotes Root & Flower Growth Bloom Booster | Horticulture Grade Soluble Plant Food | 2 lb Bag**PLANTCO**$31.09**8 rev1y ago](https://www.amazon.com/dp/B0DZ3P5XGJ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Boca Hydro MKP 0-52-34 Mono Potassium Phosphate Hydroponic Grade Water Soluble Fertilizer Bloom Booster Flowering Enhancer Root Builder for Hydroponics Soil Fertigation Vegetables Trees (1 Lb)**Boca Hydro**$18.00**0.0★**▲ 69%**](https://www.amazon.com/dp/B0GZ8QK1QT) [**Boca Hydro MKP 0-52-34 Mono Potassium Phosphate Hydroponic Grade Water Soluble Fertilizer Bloom Booster Flowering Enhancer Root Builder for Hydroponics Soil Fertigation Vegetables Trees (5 Lb)**Boca Hydro**$48.76**0.0★**▲ 69%**](https://www.amazon.com/dp/B0GZ885W35) [**Monopotassium Phosphate MKP 0-52-34 Highest Purity Haifa Grade Water Soluble Plant Nutrient Bloom Booster 2 lb**Generic**$19.95**5.0★**▲ 52%**](https://www.amazon.com/dp/B098NS3ZS9) [**Humboldts Secret Monopotassium Phosphate 0-52-34 | MKP Fertilizer Bloom Booster for Flowers Fruits & Vegetables | High Purity Water Soluble Phosphorus and Potassium Plant Food | 5 lb**Humboldts Secret**$98.35**4.6★**▲ 48%**](https://www.amazon.com/dp/B0DGN32W1L) [**Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 8 oz**TPS NUTRIENTS**$11.85**4.5★**▲ 20%**](https://www.amazon.com/dp/B0DQTQZKK4)
**~~View all trending →~~**
## **What buyers say about monopotassium phosphate**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Plant Growth**46%
*“My plants love it”*
**Quality-Overall**25%
*“Great product”*
**Value For Money**10%
*“Value for money”*
**Advertised Vs Actual Product**9%
*“As described”*
**Smell**2%
*“Favorite fragrance”*
**Ease Of Cleaning**2%
*“I also appreciate that it mixes cleanly”*
**Strength**2%
*“powerful”*
**Ease Of Use**1%
*“easy to use”*
### **What buyers complain about **
**Plant Growth**25%
*“I cant tell its helping my flowering plants put out more flowers and fruits”*
**Size-Overall**19%
*“Flower getting bigger”*
**Instructions/User Manual/Troubleshooting**13%
*“no instructions as to where to water”*
**Leak-Proof**13%
*“about 1/3 of the liquid had dripped into the bag”*
**Product Condition**13%
*“good used”*
**Value For Money**6%
*“Its pricey”*
### **Top return reasons **
**Leak-Proof**32%
**Size-Overall**17%
**Functionality-Overall**11%
**Advertised Vs Actual Product**11%
**Value For Money**10%
**Plant Growth**7%
**Contamination**5%
**Rusts/Corrodes**1%
**Instructions/User Manual/Troubleshooting**1%
**Product Condition**1%
## **Common questions**
- **Is monopotassium phosphate profitable to sell on Amazon United States?**
- The niche generates $93K/yr across 12 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +209.4%. Flapen's verdict: Worth a look (56/100).
- **How competitive is the monopotassium phosphate niche?**
- 9 brands and 10 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 84% of demand.
- **What do buyers complain about in monopotassium phosphate?**
- Top complaints mined from reviews: Plant Growth, Size-Overall, Instructions/User Manual/Troubleshooting. The return rate is 0.6%.
- **When does demand for monopotassium phosphate peak?**
- Demand peaks in May–Jun–Jul; the busiest month runs 6.0× the quietest.
- **What does it cost to enter the monopotassium phosphate niche?**
- Listings span $11.85–$98.35; the average listing price is $35.06 (sweet spot $15–$100). The average incumbent carries 963 reviews — the moat a new listing must climb.
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