phosphorus and potassium fertilizers
Worth a lookShows demand growing +266.5% this quarter, but a small market ($57K/yr) keeps it on the watch list.
Growth
Incredible+266.5%90-day search growth — must beat 0% to launch
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Avg price
Great$19.63avg listing price — sweet spot $15–$100
Price range
Great$11.85–$29.80cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Great7.3%search→purchase rate — share of searches ending in a sale
Review moat
Okay2,867.1avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Competition
Bad79%top-5 click share — a locked-up shelf
Market size
Bad$57K$57K/yr · 40K searches
Brand share
Bad95%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, phosphorus and potassium fertilizers is a $57K/yr Amazon United States market (40K searches/yr). The top 5 brands hold 95% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 15, 2026 · scored weekly · How we score niches
phosphorus and potassium fertilizers market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $39K–$49K
- units × avg price
- Conversion rate
- 7.3%
- Avg BSR
- #253
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 90%
- Out of stock
- 0.0%
- Avg brand age
- 78 months
- Avg seller age
- 143 days
Competition & brand share
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
28
Top-5 brand share
95%
Top 20: 100%
Top-5 click share
79%
Top 20: 100%
Open market
2%
- TPS NUTRIENTS50%
- Farmer's Secret26%
- Element Nutrients9%
- Prevegenics5%
- FoxFarm4%
- Espoma3%
- Open — no brand owns it (1 brand, 2%)
Top phosphorus and potassium fertilizers search terms
- phosphorus and potassium fertilizers15K/yr
- high phosphorus and potassium fertilizer5K/yr
- phosphorus and potassium fertilizer7K/yr
- potassium and phosphorus fertilizer6K/yr
- phosphorus potassium fertilizer4K/yr
- pk fertilizer3K/yr
Top phosphorus and potassium fertilizers 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.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 8 oz
TPS NUTRIENTS$11.854.5★172 rev
Farmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (32oz)
Farmer's Secret$29.804.6★3,186 rev
Farmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (8oz)
Farmer's Secret$12.994.6★3,186 rev
Bloom Booster and Yield Enhancer for Plants - Big Heavy Healthy Harvests for Use in Soil and Hydroponics - Concentrated Phosphorus and Potassium - Flower Fuel 1-34-32 250g
Element Nutrients$21.974.6★10,300 rev
Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 32 oz
TPS NUTRIENTS$24.444.5★172 rev
Newest
by launch datePhosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 8 oz
TPS NUTRIENTS$11.85172 rev
Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 32 oz
TPS NUTRIENTS$24.44172 rev
Triple Super Phosphate 0-46-0 Fertilizer high Phosphorus Fertilizer Stronger Roots & Flower Formation Ideal Super Phosphate for Plants - Flowers Fruits Vegetables & Turf 5 lb
The Grow Co$18.33418 rev
Farmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (32oz)
Farmer's Secret$29.803,186 rev
Farmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (16oz)
Farmer's Secret$20.393,186 rev
Trending
90-day click momentumFarmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (8oz)
Farmer's Secret$12.994.6★
Farmers Secret Fruit & Bloom Booster Fertilizer - Super Concentrated - Boosts Flowering and Yield on All Varieties of Fruits Vegetables and Flowers (16oz)
Farmer's Secret$20.394.6★
Triple Super Phosphate 0-46-0 Fertilizer high Phosphorus Fertilizer Stronger Roots & Flower Formation Ideal Super Phosphate for Plants - Flowers Fruits Vegetables & Turf 5 lb
The Grow Co$18.334.6★
Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 32 oz
TPS NUTRIENTS$24.444.5★
Phosphorus & Potassium Fertilizer Liquid Bloom Booster for Strong Roots Better Blooms & Improved Fruit Development 8 oz
TPS NUTRIENTS$11.854.5★
What buyers say about phosphorus and potassium fertilizers
What buyers praise and complain about, mined from review topics.What buyers love
“It has boosted the growth”
“Excellent product”
“Great value”
“Works as advertised”
“Easy to use”
“You add this to any plant and it will really grow your plants healthy and strong”
“The color of all blooms is so vibrant”
“Works well and doesn't smell. as other rose foods do”
“It is durable”
“I also appreciate that it mixes cleanly”
What buyers complain about
“Turned my plants brown”
“Flower getting bigger”
“about 1/3 of the liquid had dripped into the bag”
“so buying this fertilizer will be expensive for me”
“False Advertisement. contains Nitrogen”
“Poor quality control”
“Didnt work no good”
“no instructions as to where to water”
“good used”
“Very thin”
Top return reasons
Common questions
- Is phosphorus and potassium fertilizers profitable to sell on Amazon United States?
- The niche generates $57K/yr across 10 tracked products. 90-day search growth is +266.5%. Flapen's verdict: Worth a look (51/100).
- How competitive is the phosphorus and potassium fertilizers niche?
- 7 brands and 28 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 95% of demand.
- What do buyers complain about in phosphorus and potassium fertilizers?
- Top complaints mined from reviews: Plant Growth, Size-Overall, Leak-Proof. The return rate is 0.3%.
- What does it cost to enter the phosphorus and potassium fertilizers niche?
- Listings span $11.85–$29.80; the average listing price is $19.63 (sweet spot $15–$100). The average incumbent carries 2,867 reviews — the moat a new listing must climb.