Is kelp meal profitable to sell on Amazon United States?

The niche generates $292K/yr across 21 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -20.4%. Flapen's verdict: Worth a look (50/100).

How competitive is the kelp meal niche?

16 brands and 44 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 75% of demand.

What do buyers complain about in kelp meal?

Top complaints mined from reviews: Value For Money, Size-Overall, Smell. The return rate is 0.3%.

When does demand for kelp meal peak?

Demand peaks in Feb–Mar–Apr–May; the busiest month runs 3.6× the quietest.

What does it cost to enter the kelp meal niche?

Listings span $11.71–$152.38; the average listing price is $34.89 (sweet spot $15–$100). The average incumbent carries 1,175 reviews — the moat a new listing must climb.

kelp meal

Worth a look

Shows low returns (0.3%), but soft demand (-20.4% this quarter) keeps it on the watch list.

Returns

Incredible0.3%

return rate — above 5% kills the launch gate

Avg price

Incredible$34.89

avg listing price — sweet spot $15–$100

Conversion

Good7.0%

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

Price range

Good$11.71–$152.38

cheapest to priciest tracked listing — scored on the share inside $15–$100

Review moat

Good1,175.19

avg incumbent reviews — the moat a new listing must climb

Market size

Good$292K

$292K/yr · 120K searches

Brand share

Good75%

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

Competition

Okay63%

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

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Growth

Bad-20.4%

90-day search growth — must beat 0% to launch

According to Flapen's Amazon United States niche tracking, kelp meal is a $292K/yr Amazon United States market (120K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in Feb–Mar–Apr–May. Verdict: Worth a look — 50/100.

Data updated Jul 15, 2026 · scored weekly · How we score niches

kelp meal market data

Units sold / yr: 8K–10K; avg 250–500/product
Revenue / yr: $279K–$349K; units × avg price
Conversion rate: 7.0%
Avg BSR: #1,200
Page quality: 0%
Prime: 76%
Sponsored: 76%
Out of stock: 0.4%
Avg brand age: 88 months
Avg seller age: 166 days

Competition & brand share

The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 rising

Sellers

Top-5 brand share

75%

Top 20: 100%

Top-5 click share

63%

Top 20: 99%

Open market

20%

Down To Earth All Natural Fertilizers31%
plantonix24%
Smart Grower10%
Espoma6%
Neptune's Harvest5%
Whitney Farms5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -20.4% search growth over the last 90 days.

Peak months: Feb, Mar, Apr, May · busiest ÷ quietest = 3.6×

Open Trend

Top kelp meal search terms

kelp meal87K/yr -22.4%6.5% conv.
kelp meal organic fertilizer19K/yr -2.0%6.9% conv.
kelp meal fertilizer8K/yr -36.1%5.2% conv.
kelp meal for plants4K/yr -35.6%5.9% conv.
down to earth kelp meal2K/yr +18.0%10.1% conv.

All search terms

Top kelp meal 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

Down To Earth All Natural Fertilizers Organic Kelp Meal - Plant Food with Seaweed (Ascophyllum nodosum) Potassium and Trace Minerals 1-0.1-2 0.5 lb

Down To Earth All Natural Fertilizers$11.714.7★1,052 rev

Kelp Bliss (2lbs) - Kelp Meal for Plants - Kelp Meal Organic Fertilizer

plantonix$18.864.7★932 rev

Down To Earth All Natural Fertilizers Organic Kelp Meal - Plant Food with Seaweed (Ascophyllum nodosum) Potassium and Trace Minerals 1-0.1-2 4 lb

Down To Earth All Natural Fertilizers$38.074.7★1,052 rev

Organic Sea Kelp Fertilizer for Plants Water-Soluble Makes 50 Gallons Kelp Meal Concentrate Plant Food for Indoor Gardens Hydroponics Vegetables Houseplants - Smart Grower - 2oz Bag

Smart Grower$19.564.6★308 rev

Kelp Bliss (10lbs) - Kelp Meal for Plants - Kelp Meal Organic Fertilizer

plantonix$43.274.7★932 rev

Newest

by launch date

Whitney Farms Organic Kelp Meal 0.7-0.1-2 - Seaweed Fertilizer for Plants Soil Conditioner for Vegetables Flowers Roses and Shrubs 2 lb.

Whitney Farms$13.794 rev

11mo ago

Organic Sea Kelp Fertilizer for Plants Water-Soluble Makes 50 Gallons Kelp Meal Concentrate Plant Food for Indoor Gardens Hydroponics Vegetables Houseplants - Smart Grower - 2oz Bag

Smart Grower$19.56308 rev

1y ago

NatureGrow Kelp Meal 6lb 1-0-2 Natural Plant Food Boost Plant Health and Yield!

NatureGrow$26.75117 rev

3y ago

Down To Earth All Natural Fertilizers Organic Kelp Meal - Plant Food with Seaweed (Ascophyllum nodosum) Potassium and Trace Minerals 1-0.1-2 4 lb

Down To Earth All Natural Fertilizers$38.071,052 rev

3y ago

Bloom City Seaweed and Kelp Fertilizer Liquid Seaweed Supplement for Stronger Roots Faster Growth & Improved Stress Tolerance 8 oz

Bloom City$12.325,473 rev

4y ago

What buyers say about kelp meal

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

What buyers love

Plant Growth41%

“Plants are loving it”

Quality-Overall21%

“Good quality”

Value For Money9%

“Great buy for the Money”

Advertised Vs Actual Product7%

“Incorporated into plant feeding it works as advertised”

Smell4%

“It does not stink at all”

Ease Of Use3%

“Easy to use”

Nutritional Content2%

“kelp meal provides that”

Instructions/User Manual/Troubleshooting2%

“follow instruction”

Safety Standards2%

“It is still safe to use and is normal”

Breathability1%

“The breath is already better”

What buyers complain about

Value For Money19%

“This is priced way too high”

Size-Overall11%

“This was a very small package”

Smell8%

“Fishy smell”

Functionality-Overall6%

“didnt correct the problem”

Contamination6%

“arsenic that could be detrimental to your vegetables plants”

Quality-Overall6%

“Trash”

Bitter6%

“Abnormally bitter”

Regulates Digestion6%

“can affect ur thyroid”

Leak-Proof3%

“leaking kelp meal like crazy”

Taste-Overall3%

“Does taste a little fishy”

Top return reasons

Leak-Proof26%

Size-Overall25%

Value For Money16%

Advertised Vs Actual Product12%

Functionality-Overall6%

Plant Growth4%

Defective Material/Parts2%

Certifications1%

Product Condition1%

Durability1%

Common questions

Is kelp meal profitable to sell on Amazon United States?: The niche generates $292K/yr across 21 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -20.4%. Flapen's verdict: Worth a look (50/100).
How competitive is the kelp meal niche?: 16 brands and 44 sellers compete. The top 5 products take 63% of clicks and top 5 brands hold 75% of demand.
What do buyers complain about in kelp meal?: Top complaints mined from reviews: Value For Money, Size-Overall, Smell. The return rate is 0.3%.
When does demand for kelp meal peak?: Demand peaks in Feb–Mar–Apr–May; the busiest month runs 3.6× the quietest.
What does it cost to enter the kelp meal niche?: Listings span $11.71–$152.38; the average listing price is $34.89 (sweet spot $15–$100). The average incumbent carries 1,175 reviews — the moat a new listing must climb.