---
title: "Fungus Gnat Killer — £294K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/fungus-gnat-killer"
last_updated: "2026-08-01T00:47:22.786Z"
locale: en
meta:
description: "Niche score 50/100 · £294K/yr market · 304K searches/yr. Prices mostly outside the sweet spot ($2.56–$15.24) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 50/100 · £294K/yr market · 304K searches/yr. Prices mostly outside the sweet spot ($2.56–$15.24) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Fungus Gnat Killer — £294K/yr Amazon UK Niche (2026) - Flapen"
---
# **fungus gnat killer**
**Worth a look**
Shows low returns (0.1%), but prices mostly outside the sweet spot ($2.56–$15.24) keeps it on the watch list.
Market size 51Growth 10Conversion 90Competition 34Returns 99Price range 2Avg price 25Brand share 53Review moat 25Quality gap 92
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Great****4.0★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Great****10.8%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Market size**
**Good****£294K**
£294K/yr · 304K searches
**Competition**
**Okay****64%**
top-5 click share — leaders hold, buyers still browse
**Review moat**
**Bad****4,022.81**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Okay****£8.98**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-29.4%**
90-day search growth — must beat 0% to launch
**Price range**
**Bad****£2.56–£15.24**
cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, fungus gnat killer is a £294K/yr Amazon United Kingdom market (304K searches/yr). The top 5 brands hold 73% of demand. Demand peaks in Jan–Nov–Dec. Verdict: Worth a look — 50/100.
Data updated Jul 26, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **fungus gnat killer market data**
- **Units sold / yr**
- **30K–40K**
- avg 1,250–1,500/product
- **Revenue / yr**
- **£269K–£359K**
- units × avg price
- **Conversion rate**
- **10.8%**
- **Avg BSR**
- **#135**
- **Page quality**
- **0%**
- **Prime**
- **81%**
- **Sponsored**
- **95%**
- **Out of stock**
- **5.6%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **170 days**
## **Competition & brand share**
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**15 **▼falling
**Sellers**
**68**
**Top-5 brand share**
**73%**
Top 20: 100%
**Top-5 click share**
**64%**
Top 20: 99%
**Open market**
**21%**
- Baby Bio24% - Super Ninja17% - READY STEADY DEFEND13% - PLANT NURSE12% - Provanto7% - Gardening Naturally6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -29.4% search growth over the last 90 days.
9K7KSpike '24Spike '25Black Friday '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Nov, Dec · busiest ÷ quietest = 2.1×
[**Open Trend **](https://flapen.com/research/uk/home-garden/fungus-gnat-killer/trend)
## **Top fungus gnat killer search terms**
- **fungus gnat killer**90K/yr-17.2%7.5% conv. - **gnats killer indoor plants**40K/yr-27.4%8.5% conv. - **fungus gnat killer for indoor plants**51K/yr-51.7%7.5% conv. - **fungus gnat**23K/yr-22.7%5.1% conv. - **gnat killer**19K/yr-16.7%4.3% conv. - **bti for fungus gnats**9K/yr-10.4%4.2% conv. - **fungal gnat treatment**10K/yr-24.8%4.7% conv. - **gnat spray**10K/yr-21.3%3.7% conv. - **fungus gnats**8K/yr-22.4%6.0% conv. - **gnat**7K/yr-13.3%4.9% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/fungus-gnat-killer/search-terms)
## **Top fungus gnat killer 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%10%£29K20%£59K30%£88K40%£118K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Baby Bio Houseplant Bug Killer Ultra - Fast-Acting Bug Killer Spray - Effective Insect Control for Houseplants - Protection for Houseplants 1 Litre**Baby Bio**£4.73**4.1★1,769 rev](https://www.amazon.co.uk/dp/B0CNKRYLV3) [2**Super Ninja Fungus Gnat Killer - 30 Pack Effective Gnat Killer for Indoor Plants Non-Toxic & Nature-Friendly Safe for Kids & Pets Yellow Sticky Fly Traps Lasts Up to 3 Months**Super Ninja**£5.01**4.2★10,570 rev](https://www.amazon.co.uk/dp/B0B9H1JJ83) [3**Fungus Gnat Control Gnat Attack Tablets Natural Pesticide-Free Solution for Effective Fungus Gnat & Larvae Control.**PLANT NURSE**£11.88**3.8★110 rev](https://www.amazon.co.uk/dp/B0FVG3JX3G) [4**Fungus Gnat Killer Spray 200ml | Organic Protection Against Sciarid Flies | Effective for Houseplants Seedlings | Safe for Indoor & Outdoor Use | Targets Adults & Larvae | Eco-Friendly Formula**READY STEADY DEFEND**£12.61**3.2★307 rev](https://www.amazon.co.uk/dp/B0DNTNFTZW) [5**Fungus Gnat Nematodes for Houseplants and Indoor Plants Natural Soil Drench Treatment for Fungus Gnat Larvae in Compost Treats up to 12 sq.m**Gardening Naturally**£13.38**3.9★106 rev](https://www.amazon.co.uk/dp/B0F74B44ZX)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Green Guard Fungus Gnat Killer for Indoor Plants - 125ml Concentrate Fungus Gnat Larvae Killer & Soil Treatment Fast-Acting Natural Anti Fungal Gnat Treatment Control for Houseplants**Green Guard**£10.76**1 rev3mo ago](https://www.amazon.co.uk/dp/B0GWKBNTNC) [**Fungus Gnat Control Granules for Indoor Plants | Natural Diatomaceous Earth Soil Topper | Breaks Gnat Life Cycle & Prevents Larvae | Pesticide-Free Fungus Gnat Killer Spray Alternative | 2L**READY STEADY DEFEND**£15.24**39 rev5mo ago](https://www.amazon.co.uk/dp/B0GP1ZLPVS) [**Fungus Gnat Killer Spray 200ml for Houseplants Seedlings and Young Plants Organic Insecticidal Soap Formula Targets Sciarid Flies Larvae and Adults for Indoor and Outdoor Soil Treatment Use**READY STEADY DEFEND**£11.73**40 rev6mo ago](https://www.amazon.co.uk/dp/B0GH1XLDX4) [**Fungus Gnat Control Granules for Indoor Plants | Natural Diatomaceous Earth Soil Topper | Breaks Gnat Life Cycle & Prevents Larvae | Pesticide-Free Fungus Gnat Killer Spray Alternative | 1L**READY STEADY DEFEND**£12.53**39 rev8mo ago](https://www.amazon.co.uk/dp/B0G1CJ2S75) [**Fungus Gnat Control Gnat Attack Tablets Natural Pesticide-Free Solution for Effective Fungus Gnat & Larvae Control.**PLANT NURSE**£11.88**110 rev9mo ago](https://www.amazon.co.uk/dp/B0FVG3JX3G)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Green Guard Fungus Gnat Killer for Indoor Plants - 125ml Concentrate Fungus Gnat Larvae Killer & Soil Treatment Fast-Acting Natural Anti Fungal Gnat Treatment Control for Houseplants**Green Guard**£10.76**5.0★**▲ 369%**](https://www.amazon.co.uk/dp/B0GWKBNTNC) [**Fungus Gnat Control Granules for Indoor Plants | Natural Diatomaceous Earth Soil Topper | Breaks Gnat Life Cycle & Prevents Larvae | Pesticide-Free Fungus Gnat Killer Spray Alternative | 2L**READY STEADY DEFEND**£15.24**3.6★**▲ 342%**](https://www.amazon.co.uk/dp/B0GP1ZLPVS) [**Volcanic Pumice for Plants 38mm Dust-Free Natural Plant Pot Topper to Stop Fungus Gnats Premium Perlite Alternative for Bonsai Cactus & Soil Mixes Improves Drainage & Aeration (1L)**Growcery**£7.41**4.5★**▲ 112%**](https://www.amazon.co.uk/dp/B0D37VWV52) [**Fungus Gnat Control Granules for Indoor Plants | Natural Diatomaceous Earth Soil Topper | Breaks Gnat Life Cycle & Prevents Larvae | Pesticide-Free Fungus Gnat Killer Spray Alternative | 1L**READY STEADY DEFEND**£12.53**3.6★**▲ 70%**](https://www.amazon.co.uk/dp/B0G1CJ2S75) [**Fungus Gnat Control Gnat Attack Tablets Natural Pesticide-Free Solution for Effective Fungus Gnat & Larvae Control.**PLANT NURSE**£11.88**3.8★**▲ 52%**](https://www.amazon.co.uk/dp/B0FVG3JX3G)
**~~View all trending →~~**
## **What buyers say about fungus gnat killer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Pest/Insect Control**20%
*“Bug killer”*
**Advertised Vs Actual Product**17%
*“Exactly what I ordered”*
**Quality-Overall**12%
*“Excellent product”*
**Value For Money**11%
*“Good for money”*
**Ease Of Use**8%
*“Easy to use”*
**Adhesion/Stickiness**6%
*“Amazing, attact and stick”*
**Plant Growth**5%
*“Keeps your plants 🌱 happy”*
**Strength**4%
*“Good and strong which do the job perfectly”*
**Efficiency**3%
*“Does the job”*
**Size-Overall**2%
*“Very effective good size”*
### **What buyers complain about **
**Pest/Insect Control**25%
*“Does not kill the bugs”*
**Functionality-Overall**23%
*“Did not work”*
**Adhesion/Stickiness**11%
*“Not Sticky Atall”*
**Value For Money**8%
*“And a bit pricey”*
**Quality-Overall**4%
*“Absolute rubbish”*
**Spray/Flow**3%
*“Spray not working”*
**Plant Growth**2%
*“it scorched my plants”*
**Size-Overall**2%
*“Quite big”*
**Instructions/User Manual/Troubleshooting**2%
*“instructions could be better”*
**Strength**2%
*“too flimsy”*
### **Top return reasons **
**Functionality-Overall**22%
**Leak-Proof**14%
**Pest/Insect Control**11%
**Spray/Flow**9%
**Adhesion/Stickiness**7%
**Defective Material/Parts**6%
**Advertised Vs Actual Product**6%
**Value For Money**4%
**Size-Overall**4%
**Eco Friendliness**2%
## **Common questions**
- **Is fungus gnat killer profitable to sell on Amazon United Kingdom?**
- The niche generates £294K/yr across 21 tracked products. 1 of 6 products launched in the last 360 days are still selling. 90-day search growth is -29.4%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the fungus gnat killer niche?**
- 15 brands and 68 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in fungus gnat killer?**
- Top complaints mined from reviews: Pest/Insect Control, Functionality-Overall, Adhesion/Stickiness. The return rate is 0.1%.
- **When does demand for fungus gnat killer peak?**
- Demand peaks in Jan–Nov–Dec; the busiest month runs 2.1× the quietest.
- **What does it cost to enter the fungus gnat killer niche?**
- Listings span £2.56–£15.24; the average listing price is £8.98 (sweet spot $15–$100). The average incumbent carries 4,023 reviews — the moat a new listing must climb.
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