Liquid Kelp
MaybeAn estimated 0.4% of orders come back. But shoppers spend an estimated $67K a year here, so Liquid Kelp is a Maybe.
- Flapen Score
- 56 / 100Ranks 4,126 of 8,839 Patio, Lawn & Garden niches · on the category median56
- Market size
- $67K/yr23K searches / yr
- 90-day growth
- +162.8%search demand this quarter
- Competition
- 76%top-5 click share · 11 brands · 16 sellers
Flapen Score
Liquid Kelp against its category
The dotted line is the Patio, Lawn & Garden average. Past it, Liquid Kelp is stronger. Inside it, weaker.
Market
The Liquid Kelp market on Amazon at a glance
Shoppers on Amazon United States searched for Liquid Kelp 23K times last year and spent an estimated $67K. The top 5 brands take 91% of clicks. Demand peaks in Apr–May–Jun–Jul. Flapen scores it 56 out of 100, a Maybe.
01 · Demand
An estimated 11.8% of those searches ended in a purchase.
Shoppers searched for this 23K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 11.8% of those searches ended in a purchase. Searches in the last 90 days moved +162.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $67K a year.
- Searches, last 12 months
- 23K
- Growth, 90 days vs prior 90
- +162.8%
- Conversion, latest week
- 11.8%
- Market size, estimated
- $67Ka year
- Peak month
- June4.3× the quietest month
- Top search term
- liquid kelp19K searches a year
02 · Price
A sale here is worth $24.61.
Listings sell for $24.61 on average, from $11.84 to $40.30. Amazon reports units sold in ranges. This niche sold 2K to 3K a year. The average listing sells 100 to 250 of them. At $24.61 that is $2K to $6K a year per listing.
- Average price
- $24.61inside the $15 to $100 sweet spot
- Price range
- $11.84–$40.30
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–3K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $2K–$6K
- Returns
- 0.4%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
81% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 2.9% of listings are out of stock. The average listing ranks #688 within Soils, Mulches & Planting Media. It carries 2,155 reviews at 4.58 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 81%
- Prime listings
- 100%
- Out of stock, average day
- 2.9%
- Average rank
- #688in Soils, Mulches & Planting Media
- Average rating
- 4.58 starsAmazon United States average 4.42 stars
- Average reviews
- 2,155per listing
- Listings tracked
- 16
04 · Newcomers
2 of last year's 2 launches cleared the first-year sales bar.
2 products launched here in the last 12 months. 2 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 87 months on average, so the names here are established.
- Launched, last 12 months
- 2
- Successful launches
- 2Amazon's first-year sales bar
- Average brand age
- 87 months
Products
Top Liquid Kelp products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 15, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
GS Plant Foods Liquid Kelp Fertilizer Suitable for Organic Growing OMRI Listed Seaweed Concentrate for Lawns Gardens & Soil - 1 Gallon (Makes Up To 800+ Gallons)
- Price
- $39.37
- Rating
- 4.6/5
- Reviews
- 3,436
- Age
- 13y ago

Bloom City Seaweed and Kelp Fertilizer Liquid Seaweed Supplement for Stronger Roots Faster Growth & Improved Stress Tolerance 32 oz
- Price
- $19.20
- Rating
- 4.6/5
- Reviews
- 5,473
- Age
- 9y ago

Bloom City Seaweed and Kelp Fertilizer Liquid Seaweed Supplement for Stronger Roots Faster Growth & Improved Stress Tolerance 8 oz
- Price
- $12.32
- Rating
- 4.6/5
- Reviews
- 5,473
- Age
- 4y ago

GS Plant Foods Liquid Kelp Fertilizer Suitable for Organic Growing OMRI Listed Seaweed Concentrate for Flowers Gardens Vegetables & Soil - 1 Quart (Makes Up to 200+ Gallons)
- Price
- $19.78
- Rating
- 4.6/5
- Reviews
- 82
- Age
- 2y ago

Liquid Kelp Seaweed Fertilizer Concentrate - Blue Planet Nutrients Ascophyllum Nodosum Liquid Seaweed Supplement - Makes 470 Gallons - Quart (32 oz)
- Price
- $20.12
- Rating
- 4.7/5
- Reviews
- 3,620
- Age
- 11y ago
Trending
estimated 90-day click momentum
KelpEdge Organic Liquid Kelp Plant Supplement- Seaweed Extract Concentrated Fertilizer Booster OMRI Listed - Boosts Roots Growth & Blooms for Gardens Lawns Veggies Hydro & All Plants
- Price
- $28.73
- Rating
- 4.4/5
- Reviews
- 10
- Age
- 3mo ago

Organic Super Seaweed Humic Acid Blend- Liquid Sea Kelp for Grass and Plants - Soil Hume - Simple Grow Solutions- Natural Lawn & Garden Concentrate- Use with Fertilizer Program (32 Ounce)
- Price
- $22.57
- Rating
- 4.6/5
- Reviews
- 2,045
- Age
- 7y ago

Bloom City Seaweed and Kelp Fertilizer Liquid Seaweed Supplement for Stronger Roots Faster Growth & Improved Stress Tolerance 1 Gallon
- Price
- $38.15
- Rating
- 4.6/5
- Reviews
- 5,473
- Age
- 9y ago

Grow Queen Organic Liquid Kelp & Seaweed Extract Prop Drop (Ecklonia Maxima) Root + Plant Growth Hormone & Root Plant Food for Water Propagation Hydroponics & Soil 8oz 55 Gallons
- Price
- $18.74
- Rating
- 4.7/5
- Reviews
- 140
- Age
- 8mo ago

Liquid Kelp Seaweed Fertilizer Concentrate - Blue Planet Nutrients Ascophyllum Nodosum Liquid Seaweed Supplement - Makes 470 Gallons - Quart (32 oz)
- Price
- $20.12
- Rating
- 4.7/5
- Reviews
- 3,620
- Age
- 11y ago
Newest
by launch date
KelpEdge Organic Liquid Kelp Plant Supplement- Seaweed Extract Concentrated Fertilizer Booster OMRI Listed - Boosts Roots Growth & Blooms for Gardens Lawns Veggies Hydro & All Plants
- Price
- $28.73
- Rating
- 4.4/5
- Reviews
- 10
- Age
- 3mo ago

Grow Queen Organic Liquid Kelp & Seaweed Extract Prop Drop (Ecklonia Maxima) Root + Plant Growth Hormone & Root Plant Food for Water Propagation Hydroponics & Soil 8oz 55 Gallons
- Price
- $18.74
- Rating
- 4.7/5
- Reviews
- 140
- Age
- 8mo 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
- Price
- $19.56
- Rating
- 4.6/5
- Reviews
- 308
- Age
- 1y ago

Nordic Kelp Boost Liquid - Perfect Plants (1 Gallon)
- Price
- $24.81
- Rating
- 4.0/5
- Reviews
- 39
- Age
- 1y ago

Seaweed Fertilizer Organic Kelp Plant Food for All Plants Boosts Nutrient Uptake for a Lush Vibrant Garden 8 oz
- Price
- $11.84
- Rating
- 4.5/5
- Reviews
- 127
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 76% of clicks. A locked shelf that new listings rarely crack.
Brands
11 rising
Sellers
16
Est. top-5 brand share
91%
Top 20: 100%
Est. top-5 click share
76%
Top 20: 100%
Open market
7%
- Bloom City40%
- GS Plant Foods37%
- Blue Planet Nutrients9%
- TPS NUTRIENTS2%
- Smart Grower2%
- Neptune's Harvest2%
- Open — no brand owns it (5 brands, 7%)
Demand
Liquid Kelp search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 4.3×
Reviews and returns
What reviews say buyers love and hate about Liquid Kelp
We read the reviews and the return reasons for every product selling here.
“This stuff is a bit pricey”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Liquid Kelp questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









