slow release fertilizer
Skip itPrices mostly outside the sweet spot ($4.95–$14.67) — this niche doesn't clear our bar today.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Conversion
Incredible12.6%search→purchase rate — share of searches ending in a sale
Review moat
Good849.86avg incumbent reviews — the moat a new listing must climb
Growth
Good+37.9%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Bad£8.66avg listing price — sweet spot $15–$100
Competition
Bad76%top-5 click share — a locked-up shelf
Market size
Bad£72K£72K/yr · 66K searches
Brand share
Bad96%top-5 brand share — brand-locked demand
Price range
Bad£4.95–£14.67cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, slow release fertilizer is a £72K/yr Amazon United Kingdom market (66K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Mar–Apr–May–Jun. Verdict: Skip it — 44/100.
Data updated Jul 26, 2026 · scored weekly · How we score niches
slow release fertilizer market data
- Units sold / yr
- 10K–13K
- avg 750–1,000/product
- Revenue / yr
- £87K–£108K
- units × avg price
- Conversion rate
- 12.6%
- Avg BSR
- #56
- Page quality
- 0%
- Prime
- 71%
- Sponsored
- 57%
- Out of stock
- 4.7%
- Avg brand age
- 58 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 flat
Sellers
81
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
76%
Top 20: 100%
Open market
2%
- Westland40%
- Miracle-Gro39%
- Grow Chem8%
- Renaissance6%
- Goulding3%
- Topline2%
- Open — no brand owns it (1 brand, 2%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +37.9% search growth over the last 90 days.Peak months: Mar, Apr, May, Jun · busiest ÷ quietest = 16.4×
Top slow release fertilizer search terms
- slow release fertiliser granules29K/yr
- slow release plant food12K/yr
- slow release fertilizer12K/yr
- plant food granules6K/yr
- slow release fertiliser4K/yr
- plant food granules slow release3K/yr
Top slow release fertilizer 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 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Miracle-Gro Continuous Release All Purpose Plant Food 900G White
Miracle-Gro£5.004.6★2,540 rev
Westland Boost Slow Release Plant Food 750g
Westland£4.954.5★180 rev
Westland Boost Slow Release Plant Food 2kg
Westland£10.074.4★154 rev
Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg Green Brown
Miracle-Gro£8.404.6★5,434 rev
Grow Chem Growmore Fertiliser (1KG Bucket) Multi-Purpose Plant Food Granules NPK 7-7-7 Nourishes Plants with Essential Nutrients Suitable for All Plant Types Garden Fertiliser
Grow Chem£7.194.5★737 rev
Newest
by launch date
Westland Growmore 4Kg
Westland£7.5337 rev
Gro-Sure All Purpose Slow Release Plant Food Dual Action Granules for Long-Lasting Blooms Slow Release Nutrients Ideal for Flowers Fruits & Vegetables Feeds for 6 Months (1.1Kg Jar)
TOP SAVER£11.7777 rev
Westland Boost Slow Release Plant Food 750g
Westland£4.95180 rev
Westland Boost Slow Release Plant Food 2kg
Westland£10.07154 rev
Westland Growmore 8kg
Westland£13.16450 rev
Trending
90-day click momentumWestland Growmore 4Kg
Westland£7.534.5★
Grow Chem Growmore Fertiliser (1KG Bucket) Multi-Purpose Plant Food Granules NPK 7-7-7 Nourishes Plants with Essential Nutrients Suitable for All Plant Types Garden Fertiliser
Grow Chem£7.194.5★
Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg Green Brown
Miracle-Gro£8.404.6★
Westland Boost Slow Release Plant Food 750g
Westland£4.954.5★
Miracle-Gro Premium Rose & Shrub Continuous Release Plant Food 900G
Miracle-Gro£5.374.6★
What buyers say about slow release fertilizer
What buyers praise and complain about, mined from review topics.What buyers love
“Worth the cost”
“Healthy, greener growth all round”
“Excellent product”
“Easy to use”
“does deliver what it promises”
“Used for years”
“a good size”
“Westland of a trusted brand”
“Very effective”
“Works well”
What buyers complain about
“Bag was smaller than expected”
“Even the plants I barely touched with it”
“so poor value”
“Misleading Information”
“the contents spilled”
“doesn't last all that long in my garden”
“The instructions for use aren't clear at all”
“Careful”
“Difficult to gauge how much to use”
“Not very dissolvable without rain”
Top return reasons
Common questions
- Is slow release fertilizer profitable to sell on Amazon United Kingdom?
- The niche generates £72K/yr across 14 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +37.9%. Flapen's verdict: Skip it (44/100).
- How competitive is the slow release fertilizer niche?
- 7 brands and 81 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in slow release fertilizer?
- Top complaints mined from reviews: Size-Overall, Plant Growth, Value For Money. The return rate is 0.1%.
- When does demand for slow release fertilizer peak?
- Demand peaks in Mar–Apr–May–Jun; the busiest month runs 16.4× the quietest.
- What does it cost to enter the slow release fertilizer niche?
- Listings span £4.95–£14.67; the average listing price is £8.66 (sweet spot $15–$100). The average incumbent carries 850 reviews — the moat a new listing must climb.