Is calcium for plants profitable to sell on Amazon United States?

The niche generates $65K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +222.2%. Flapen's verdict: Worth a look (53/100).

How competitive is the calcium for plants niche?

11 brands and 58 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 86% of demand.

What do buyers complain about in calcium for plants?

Top complaints mined from reviews: Plant Growth, Value For Money, Contamination. The return rate is 0.4%.

When does demand for calcium for plants peak?

Demand peaks in May–Jun–Jul–Aug; the busiest month runs 10.7× the quietest.

What does it cost to enter the calcium for plants niche?

Listings span $9.96–$19.85; the average listing price is $15.03 (sweet spot $15–$100). The average incumbent carries 3,307 reviews — the moat a new listing must climb.

calcium for plants

Worth a look

Shows demand growing +222.2% this quarter, but a small market ($65K/yr) keeps it on the watch list.

Growth

Incredible+222.2%

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

Returns

Incredible0.4%

return rate — above 5% kills the launch gate

Conversion

Incredible15.1%

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

Avg price

Great$15.03

avg listing price — sweet spot $15–$100

Price range

Okay$9.96–$19.85

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

Review moat

Okay3,306.79

avg incumbent reviews — the moat a new listing must climb

Brand share

Okay86%

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Competition

Bad77%

top-5 click share — a locked-up shelf

Market size

Bad$65K

$65K/yr · 28K searches

Signals Trending Low Review Barrier

According to Flapen's Amazon United States niche tracking, calcium for plants is a $65K/yr Amazon United States market (28K searches/yr). The top 5 brands hold 86% of demand. Demand peaks in May–Jun–Jul–Aug. Verdict: Worth a look — 53/100.

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

calcium for plants market data

Units sold / yr: 3K–3K; avg 100–250/product
Revenue / yr: $38K–$45K; units × avg price
Conversion rate: 15.1%
Avg BSR: #493
Page quality: 0%
Prime: 93%
Sponsored: 64%
Out of stock: 3.7%
Avg brand age: 87 months
Avg seller age: 157 days

Competition & brand share

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

Top-5 brand share

86%

Top 20: 100%

Top-5 click share

77%

Top 20: 100%

Open market

10%

TPS NUTRIENTS27%
Bloom City24%
Bonide18%
Cz Garden Supply13%
Southern Ag5%
FOVGOTAN4%
Open — no brand owns it (5 brands, 10%)

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — +222.2% search growth over the last 90 days.

Peak months: May, Jun, Jul, Aug · busiest ÷ quietest = 10.7×

Open Trend

Top calcium for plants 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 14 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Calcium for Plants Liquid Calcium Supplement for Stronger Growth Healthier New Leaves & Reduced Deficiencies 8 oz

TPS NUTRIENTS$11.264.4★151 rev

Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer Quart (32 oz)

Bloom City$17.404.7★6,860 rev

Bonide Rot-Stop Tomato Blossom End Rot 16 oz Concentrated Liquid Garden Fertilizer for Calcium Deficiency Indoors & Outdoors

Bonide$10.374.5★5,165 rev

Calcium Nitrate 15.5-0-0 Fertilizer - Made in USA - 5LB Greenhouse Grade Plant Food for Hydroponics Plants & Gardens Fruit Vegetables. Blossom End Rot Tomatoes

Cz Garden Supply$19.404.7★562 rev

Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer 1/2 Pint (8 oz)

Bloom City$11.474.7★6,860 rev

Newest

by launch date

Athena$16.27165 rev

6mo ago

1LB Calcium Nitrate Fertilizer 15.5-0-0 Nitrogen Fertilizer with Calcium Indoor Plant Fertilizer Plant Food for Houseplants Lawn Vegetable Trees Boost Stem & Leaf Growth Improves Root Health

FOVGOTAN$9.9625 rev

7mo ago

Calcium Nitrate Fertilizer Liquid Fertilizer Supplement for Fast Leaf Growth Stronger Cell Wall Development & Prevents Blossom End Rot 8 oz

TPS NUTRIENTS$11.86152 rev

1y ago

16oz Cal Mag for Plants - Makes 96 Gallons of Calmag for Plants Fertilizer Liquid Cal-Mag for Plants Indoors & Outdoors Ideal Calmag Supplement with 3-0-0 NPK - Corrects Common Plant Deficiencies

HiThrive$12.9644 rev

1y ago

Calcium for Plants Liquid Calcium Supplement for Stronger Growth Healthier New Leaves & Reduced Deficiencies 8 oz

TPS NUTRIENTS$11.26151 rev

2y ago

What buyers say about calcium for plants

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

What buyers love

Plant Growth30%

“Great product results in Beautiful plants”

Ease Of Use15%

“Easy to use”

Advertised Vs Actual Product14%

“As advertised”

Quality-Overall12%

“Reliable quality and consistent results”

Value For Money12%

“the price is reasonable”

Durability2%

“This stuff is strong, reliable and never runs out”

Functionality-Overall1%

“A large supply ad it works”

Moist/Dry1%

“No more dry rot at all”

Measurement/Reading Accuracy1%

“The liquid format makes it easy to work into a regular watering routine without any complicated measuring or mixing”

Maintenance And Repair1%

“Great, quickly fix”

What buyers complain about

Plant Growth38%

“it didnt do much for my plants so use that for your own judgment”

Value For Money11%

“No a good value for the price”

Contamination7%

“Who knows if anything got blocked inside caused an infection which they died of”

Functionality-Overall7%

“Didnt work for me”

Size-Overall6%

“Bottle size feels bulky for smaller plant collections”

Quality-Overall4%

“garbage that doesnt work”

Color4%

“The yellowing has gone away”

Measurement/Reading Accuracy4%

“so youre not constantly measuring out large amounts”

Top return reasons

Leak-Proof30%

Value For Money18%

Advertised Vs Actual Product13%

Functionality-Overall9%

Size-Overall8%

Defective Material/Parts5%

Instructions/User Manual/Troubleshooting4%

Plant Growth3%

Smell2%

Ease Of Use2%

Common questions

Is calcium for plants profitable to sell on Amazon United States?: The niche generates $65K/yr across 14 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +222.2%. Flapen's verdict: Worth a look (53/100).
How competitive is the calcium for plants niche?: 11 brands and 58 sellers compete. The top 5 products take 77% of clicks and top 5 brands hold 86% of demand.
What do buyers complain about in calcium for plants?: Top complaints mined from reviews: Plant Growth, Value For Money, Contamination. The return rate is 0.4%.
When does demand for calcium for plants peak?: Demand peaks in May–Jun–Jul–Aug; the busiest month runs 10.7× the quietest.
What does it cost to enter the calcium for plants niche?: Listings span $9.96–$19.85; the average listing price is $15.03 (sweet spot $15–$100). The average incumbent carries 3,307 reviews — the moat a new listing must climb.