Lawn & garden
Westland Bone Meal dupe
Why pay around £5.49 for Westland? The bulk active is Steamed bone meal (agricultural, ~3.5-18-0) — 76% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Westland Bone Meal
1.5 kg box · £5.49 typical snapshot
Ground sterilised bone (typically ~3.5-18-0)
2 · Active
Steamed bone meal (phosphate)
18% on the label
68476-17-1Ca5(PO4)3OH (bone phosphate)
Bulk Steamed bone meal (agricultural, ~3.5-18-0)
3 · Mix
70 g/m² around trees, shrubs, roses and bulbs (Westland planting band)
£0.06 per working litre · 76% less than the shelf pack
- Active
- Steamed bone meal (phosphate)
- CAS
- 68476-17-1
- Dupe
- Steamed bone meal (agricultural, ~3.5-18-0)
- Saving
- 76% / L
Saving is per litre of working-strength mix versus a typical pack price, not versus the DIY kit total. Shop prices move — always check the listing.
Label teardown
What the pack promises versus what the label chemistry actually is.
The marketing claim
“Encourages strong root development”
The chemical reality
Westland’s 1.5 kg box is steamed bone meal — slow organic phosphate (typically about 3.5-18-0), not Growmore 7-7-7, not superphosphate 0-17-0, and not Fish, Blood & Bone (a three-meal blend). A 25 kg agricultural sack is the same ground bone. CAS 68476-17-1 is the meal, not a secret rooting hormone.
Active vs filler
18% Steamed bone meal (phosphate) · 82% carrier / filler — Ground sterilised bone (typically ~3.5-18-0)
- Typical retail
- £5.49
- 1.5 kg box
- Estimated active cost
- £1.32
- Scaled from bulk £22.00 / 25 kg
- Indicative markup
- 4.2×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 1.5 kg box pack of Westland Bone Meal typically retails around £5.49 in lawn & garden. That is a UK shelf-price snapshot for the maths on this page — not a live shop quote or a manufacturer RRP. Listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Encourages strong root development; Ideal for trees, shrubs, roses and bulbs; and Slow-release organic phosphate.
The catch: Westland’s 1.5 kg box is steamed bone meal — slow organic phosphate (typically about 3.5-18-0), not Growmore 7-7-7, not superphosphate 0-17-0, and not Fish, Blood & Bone (a three-meal blend). A 25 kg agricultural sack is the same ground bone. CAS 68476-17-1 is the meal, not a secret rooting hormone.
- “Encourages strong root development”
- “Ideal for trees, shrubs, roses and bulbs”
- “Slow-release organic phosphate”
Proprietary Blend & Dosage Breakdown
The labelled active is Steamed bone meal (phosphate) at 18%. Everything else in the pack is ground sterilised bone (typically ~3.5-18-0).
At 18% active, most of what you pay for is carrier and packaging. The brand is selling convenience, fragrance and a label — not a uniquely potent molecule.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 18% Steamed bone meal (agricultural, ~3.5-18-0), mixed to 70 g/m² around trees, shrubs, roses and bulbs (Westland planting band).
- Labelled active
- Steamed bone meal (phosphate)
- 18%
- Carrier
- Ground sterilised bone (typically ~3.5-18-0)
- Retail pack
- 1.5 kg box · £5.49
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Steamed bone meal (agricultural, ~3.5-18-0) at 18% bulk. Indexed as CAS 68476-17-1, formula Ca5(PO4)3OH (bone phosphate). Buy it as 25 kg for around £22.00 from Amazon UK.
Working strength: 70 g/m² around trees, shrubs, roses and bulbs (Westland planting band). Indicative cost £0.06 per diluted litre — 76% below a typical branded pack on a per-litre basis, before you reuse leftover bulk.
Follow the mixing method and the supplier SDS. Wear the listed PPE. Do not mix incompatible oxidisers, acids or ammonia.
- Wear gloves and a dust mask when tipping the sack — bone meal is a fine organic dust. Wash hands after. Keep away from foxes and dogs that may dig for the smell.
- Broadcast about 70 g/m² and fork into the topsoil, or mix a handful into a planting hole under trees, shrubs, roses and bulbs. Water in. That is the garden-centre planting rate.
- 25 kg at 70 g/m² covers about 357 m² — more than sixteen 1.5 kg boxes.
- This is slow organic phosphate, not a complete NPK, not mineral superphosphate and not Fish, Blood & Bone. Do not pile it against stems. Store dry and labelled.
Dilution recipe
5 L sprayer
Working strength 70 g/m² around trees, shrubs, roses and bulbs (Westland planting band). Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
7,000 grams
Steamed bone meal (agricultural, ~3.5-18-0)
Water
5 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
Loading calculator…
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedWestland | Raw active dupeDupeStack |
|---|---|---|
| Product | Bone MealAmazon UK search — listing, not a confirmed seller | Steamed bone meal (agricultural, ~3.5-18-0) |
| Pack / unit | 1.5 kg box · £5.49 | 25 kg · £22.00 |
| Active | Steamed bone meal (phosphate) at 18%Carrier: Ground sterilised bone (typically ~3.5-18-0) | 18% bulkCa5(PO4)3OH (bone phosphate) |
| CAS number | Not disclosed on pack | 68476-17-1 |
| Working strength | Ready-to-use pack | Dilute 70 g/m² around trees, shrubs, roses and bulbs (Westland planting band) |
| Cost per litre | £5.49 / pack | £0.06 / L mixed from bulk |
| Headline saving | Baseline | 76% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene)Ventilation. Use outdoors or with mechanical extraction |
Active ingredient and cheaper alternative — FAQ
Is bone meal the same as Westland Fish, Blood & Bone?
No. Fish, Blood & Bone is a three-meal blend (Westland about 3-9-3). Bone meal is steamed bone only — phosphate-forward, almost no potash. Superphosphate is a mineral 0-17-0, not an organic meal. Pick the teardown that matches the bag.
Will bone meal replace Growmore?
Not as a complete feed. Growmore is inorganic 7-7-7. Bone meal is a slow P source for planting holes and established shrubs. It will not green a hungry lawn the way sulphate of ammonia does.
How do you mix the Bone Meal dupe stack?
Wear gloves and a dust mask when tipping the sack — bone meal is a fine organic dust. Wash hands after. Keep away from foxes and dogs that may dig for the smell. Broadcast about 70 g/m² and fork into the topsoil, or mix a handful into a planting hole under trees, shrubs, roses and bulbs. Water in. That is the garden-centre planting rate. 25 kg at 70 g/m² covers about 357 m² — more than sixteen 1.5 kg boxes. This is slow organic phosphate, not a complete NPK, not mineral superphosphate and not Fish, Blood & Bone. Do not pile it against stems. Store dry and labelled.
DupeStack provides chemical concentration data and educational mixing guides only. Wellness pages compare food supplements, not medicines or prescribed treatments. Always review the supplier Safety Data Sheet (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Mixing and storage are at your own risk. Some links are affiliate advertisements (Amazon Associates, eBay Partner Network, and Awin when those programmes are live). Commissions do not change listed concentrations or calculator output.
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£34.00Save 76% / L
Indicative DIY stack