---
title: "Slow Release Fertilizer — £72K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/home-garden/slow-release-fertilizer"
last_updated: "2026-07-31T19:48:25.039Z"
locale: en
meta:
description: "Niche score 44/100 · £72K/yr market · 66K searches/yr · £8.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 44/100 · £72K/yr market · 66K searches/yr · £8.66 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Slow Release Fertilizer — £72K/yr Amazon UK Niche (2026) - Flapen"
---
# **slow release fertilizer**
**Skip it**
Prices mostly outside the sweet spot ($4.95–$14.67) — this niche doesn't clear our bar today.
Market size 18Growth 61Conversion 95Competition 20Returns 100Price range 0Avg price 24Brand share 10Review moat 66Quality gap 43
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.6%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****849.86**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Good****+37.9%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Bad****£8.66**
avg listing price — sweet spot $15–$100
**Competition**
**Bad****76%**
top-5 click share — a locked-up shelf
**Market size**
**Bad****£72K**
£72K/yr · 66K searches
**Brand share**
**Bad****96%**
top-5 brand share — brand-locked demand
**Price range**
**Bad****£4.95–£14.67**
cheapest 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 ~~](https://flapen.com/research/methodology)
## **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.
4K3KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Apr, May, Jun · busiest ÷ quietest = 16.4×
[**Open Trend **](https://flapen.com/research/uk/home-garden/slow-release-fertilizer/trend)
## **Top slow release fertilizer search terms**
- **slow release fertiliser granules**29K/yr+34.4%16.5% conv. - **slow release plant food**12K/yr+74.7%12.7% conv. - **slow release fertilizer**12K/yr-7.8%8.4% conv. - **plant food granules**6K/yr+125.5%13.2% conv. - **slow release fertiliser**4K/yr+3.2%10.3% conv. - **plant food granules slow release**3K/yr+86.7%15.9% conv. [**All search terms **](https://flapen.com/research/uk/home-garden/slow-release-fertilizer/search-terms)
## **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.
0%10%£7K20%£14K30%£22K40%£29K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Miracle-Gro Continuous Release All Purpose Plant Food 900G White**Miracle-Gro**£5.00**4.6★2,540 rev](https://www.amazon.co.uk/dp/B09WPQD43J) [2**Westland Boost Slow Release Plant Food 750g**Westland**£4.95**4.5★180 rev](https://www.amazon.co.uk/dp/B0DTB5YWJB) [3**Westland Boost Slow Release Plant Food 2kg**Westland**£10.07**4.4★154 rev](https://www.amazon.co.uk/dp/B0DTB57QFQ) [4**Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg Green Brown**Miracle-Gro**£8.40**4.6★5,434 rev](https://www.amazon.co.uk/dp/B000TAUI1M) [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**£7.19**4.5★737 rev](https://www.amazon.co.uk/dp/B09RZQPF1X)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Westland Growmore 4Kg**Westland**£7.53**37 rev8mo ago](https://www.amazon.co.uk/dp/B0G2SZCJ3C) [**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**£11.77**77 rev1y ago](https://www.amazon.co.uk/dp/B0DVCYHMRW) [**Westland Boost Slow Release Plant Food 750g**Westland**£4.95**180 rev1y ago](https://www.amazon.co.uk/dp/B0DTB5YWJB) [**Westland Boost Slow Release Plant Food 2kg**Westland**£10.07**154 rev1y ago](https://www.amazon.co.uk/dp/B0DTB57QFQ) [**Westland Growmore 8kg**Westland**£13.16**450 rev2y ago](https://www.amazon.co.uk/dp/B0CL7JW1DS)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Westland Growmore 4Kg**Westland**£7.53**4.5★**▲ 65%**](https://www.amazon.co.uk/dp/B0G2SZCJ3C) [**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**£7.19**4.5★**▲ 41%**](https://www.amazon.co.uk/dp/B09RZQPF1X) [**Miracle-Gro 17684 All Purpose Continuous Release Plant Food 1 kg Green Brown**Miracle-Gro**£8.40**4.6★**▲ 27%**](https://www.amazon.co.uk/dp/B000TAUI1M) [**Westland Boost Slow Release Plant Food 750g**Westland**£4.95**4.5★**▲ 24%**](https://www.amazon.co.uk/dp/B0DTB5YWJB) [**Miracle-Gro Premium Rose & Shrub Continuous Release Plant Food 900G**Miracle-Gro**£5.37**4.6★**▲ 23%**](https://www.amazon.co.uk/dp/B09WMVZWBR)
**~~View all trending →~~**
## **What buyers say about slow release fertilizer**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**25%
*“Worth the cost”*
**Plant Growth**24%
*“Healthy, greener growth all round”*
**Quality-Overall**19%
*“Excellent product”*
**Ease Of Use**17%
*“Easy to use”*
**Advertised Vs Actual Product**7%
*“does deliver what it promises”*
**Durability**4%
*“Used for years”*
**Size-Overall**1%
*“a good size”*
**Locally Manufactured**1%
*“Westland of a trusted brand”*
**Strength**1%
*“Very effective”*
**Efficiency**1%
*“Works well”*
### **What buyers complain about **
**Size-Overall**19%
*“Bag was smaller than expected”*
**Plant Growth**15%
*“Even the plants I barely touched with it”*
**Value For Money**14%
*“so poor value”*
**Advertised Vs Actual Product**11%
*“Misleading Information”*
**Leak-Proof**8%
*“the contents spilled”*
**Durability**7%
*“doesn't last all that long in my garden”*
**Instructions/User Manual/Troubleshooting**3%
*“The instructions for use aren't clear at all”*
**Contamination**3%
*“Careful”*
**Ease Of Use**3%
*“Difficult to gauge how much to use”*
**Water Resistance**3%
*“Not very dissolvable without rain”*
### **Top return reasons **
**Leak-Proof**32%
**Defective Material/Parts**18%
**Size-Overall**11%
**Advertised Vs Actual Product**10%
**Contamination**7%
**Value For Money**4%
**Plant Growth**3%
**Moist/Dry**2%
**Water Resistance**2%
**Color**2%
## **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.
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