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.

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.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Quality gap

Great4.0★

avg incumbent rating — lower means beatable quality

Conversion

Great10.8%

search→purchase rate — share of searches ending in a sale

Brand share

Good73%

top-5 brand share — brands hold most of the demand

Market size

Good£294K

£294K/yr · 304K searches

Competition

Okay64%

top-5 click share — leaders hold, buyers still browse

Review moat

Bad4,022.81

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

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

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.

Peak months: Jan, Nov, Dec · busiest ÷ quietest = 2.1×

Open Trend

Top fungus gnat killer search terms

fungus gnat killer90K/yr -17.2%7.5% conv.
gnats killer indoor plants40K/yr -27.4%8.5% conv.
fungus gnat killer for indoor plants51K/yr -51.7%7.5% conv.
fungus gnat23K/yr -22.7%5.1% conv.
gnat killer19K/yr -16.7%4.3% conv.
bti for fungus gnats9K/yr -10.4%4.2% conv.
fungal gnat treatment10K/yr -24.8%4.7% conv.
gnat spray10K/yr -21.3%3.7% conv.
fungus gnats8K/yr -22.4%6.0% conv.
gnat7K/yr -13.3%4.9% conv.

All 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.

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

Baby Bio Houseplant Bug Killer Ultra - Fast-Acting Bug Killer Spray - Effective Insect Control for Houseplants - Protection for Houseplants 1 Litre

Baby Bio£4.734.1★1,769 rev

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£5.014.2★10,570 rev

Fungus Gnat Control Gnat Attack Tablets Natural Pesticide-Free Solution for Effective Fungus Gnat & Larvae Control.

PLANT NURSE£11.883.8★110 rev

READY STEADY DEFEND£12.613.2★307 rev

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£13.383.9★106 rev

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£10.761 rev

3mo ago

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£15.2439 rev

5mo ago

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£11.7340 rev

6mo ago

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£12.5339 rev

8mo ago

Fungus Gnat Control Gnat Attack Tablets Natural Pesticide-Free Solution for Effective Fungus Gnat & Larvae Control.

PLANT NURSE£11.88110 rev

9mo ago

What buyers say about fungus gnat killer

What buyers praise and complain about, mined from review topics.

What buyers love

Pest/Insect Control20%

“Bug killer”

Advertised Vs Actual Product17%

“Exactly what I ordered”

Quality-Overall12%

“Excellent product”

Value For Money11%

“Good for money”

Ease Of Use8%

“Easy to use”

Adhesion/Stickiness6%

“Amazing, attact and stick”

Plant Growth5%

“Keeps your plants 🌱 happy”

Strength4%

“Good and strong which do the job perfectly”

Efficiency3%

“Does the job”

Size-Overall2%

“Very effective good size”

What buyers complain about

Pest/Insect Control25%

“Does not kill the bugs”

Functionality-Overall23%

“Did not work”

Adhesion/Stickiness11%

“Not Sticky Atall”

Value For Money8%

“And a bit pricey”

Quality-Overall4%

“Absolute rubbish”

Spray/Flow3%

“Spray not working”

Plant Growth2%

“it scorched my plants”

Size-Overall2%

“Quite big”

Instructions/User Manual/Troubleshooting2%

“instructions could be better”

Strength2%

“too flimsy”

Top return reasons

Functionality-Overall22%

Leak-Proof14%

Pest/Insect Control11%

Spray/Flow9%

Adhesion/Stickiness7%

Defective Material/Parts6%

Advertised Vs Actual Product6%

Value For Money4%

Size-Overall4%

Eco Friendliness2%

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.