How many bricks do you need?
Tell us what you're filling and we'll calculate it instantly. No guesswork, no waste — just the right amount of UK-shipped, peat-free coco coir.
🚚Free UK delivery
🌱100% peat-free
⚖️Buffered & pH balanced
🇬🇧UK company
Coco Coir Quantity Calculator
Tell us about your setup — answer one question at a time and your result appears at the end.
1
What you're
filling
filling
2
Enter
dimensions
dimensions
3
Choose
mix %
mix %
4
Your
result
result
1 What are you filling?
Raised Bed
Length × Width × Depth
Container / Pot
Diameter × Depth
Multiple Pots
Number × pot size
Custom Volume
Enter litres directly
2 Enter your dimensions
3 Coco coir as % of your mix
100% (Pure coco)
50% (Recommended blend)
33% (Soil amendment)
25% (Light boost)
Custom %
%
You will need
0
5 kg coco coir bricks
Total coco needed0 L
Total bed/pot volume0 L
Expanded from0 kg dry
Estimated cost£0.00
Free UK delivery · Dispatched within 24h
Why plants grow better
Coco coir vs traditional peat compost
It's not just about being peat-free. Coco coir gives roots the air, water and nutrient balance they need to outperform plants grown in peat — across the whole season.
🌱
The UK peat-free shift — what you need to know
There is currently no enacted statutory ban on peat-based compost for amateur or professional use in the UK. A private members' bill — the Horticultural Peat (Prohibition of Sale) Bill — went before Parliament in February 2026 but has not passed into law.
What has changed is the operational reality, led by the UK's major gardening authorities and retailers:
What has changed is the operational reality, led by the UK's major gardening authorities and retailers:
- Royal Horticultural Society (RHS) — peat-free across all RHS gardens and public plant sales from January 2026.
- Royal Botanic Gardens, Kew — peat-free across operations from the end of 2025.
- B&Q — peat-free bagged compost range since 2023.
- Verve (Kingfisher own-label) — peat-free from January 2026.
What it does for your plants
⭐ Buffered coco coir
🌱 Plain coco coir
🟫 Peat compost
Ready to useOut of the bag, no prep
Yes — pre-washed, pre-balanced, plant straight away
No — needs rinsing & cal-mag pre-treatment first
Yes — but acidic and prone to compaction
pH stabilityAffects nutrient uptake
Pre-balanced 5.5–6.5 — perfect for edibles & ornamentals
Variable — must be tested & adjusted before use
Acidic 3.5–4.5 — needs lime correction
Sodium & salt contentHigh salts kill seedlings
Washed to safe EC — ready for sensitive crops
May contain residual salts unless washed; can cause Cal-Mag deficiency in retail-gardening use without Cal-Mag supplementation
Low salt but acidic stress on roots
Nutrient holding (CEC)Holds feed where roots can use it
High CEC, pre-loaded with calcium & magnesium
High CEC but locks up Ca/Mg until buffered
Lower CEC — nutrients wash through faster
Root oxygen & aerationAir-filled porosity drives root growth
High — 20–30% air space, holds structure all season
High — same physical structure as buffered
Low — compacts within weeks, suffocates roots
Water retention & rewettingLess wilt, fewer waterings
Holds 8–10× weight, rehydrates instantly
Holds 8–10× weight, rehydrates instantly
Goes hydrophobic when dry — water runs off
Disease & root healthQuiet protection for young roots
Naturally suppresses pythium & fusarium
Naturally suppresses pythium & fusarium
Can harbour fungal pathogens
Future availabilityUK market shifting via retailer commitments
Future-proof — fully legal & widely available
Same — fully legal & widely available (check the label for a buffered grade)
Major UK retailers (B&Q since 2023; RHS, Kew, Verve from 2025–2026) already peat-free; statutory position under review
Environmental impactFor the planet, not just the plant
Renewable coconut by-product, peat-free
Renewable coconut by-product, peat-free
Destroys ancient peat bogs & releases CO₂
FAQs
Quick answers
How much does one brick make?
One 5 kg compressed brick expands to roughly 75 litres of light, fluffy growing medium when soaked in approximately 20 litres of clean water for 20–30 minutes.
Do I need to buffer or wash it?
No. Our coco coir is pre-buffered and pH-balanced — just add water and use. No rinsing, no cal-mag pre-treatment needed.
Can I use 100% coco coir, or should I blend it?
Both work. Use 100% for hydroponic drain-to-waste, seedlings and propagation. Blend at 50% with compost for raised beds and containers — it's the sweet spot for most UK gardeners.
How long does delivery take?
Free UK delivery, dispatched within 24 hours of order. Most orders arrive in 2–3 working days.
Is coco coir really better for plants?
Yes. Coco coir delivers higher air-filled porosity, more stable pH, better water retention and stronger root development than peat — particularly across a full growing season where peat compacts and goes hydrophobic.
What's in your buffered brick?
100% coconut coir, washed and pre-buffered with calcium and magnesium. No peat, no fillers, no chemicals.
How should I store unused bricks?
Keep them dry in their original packaging. Compressed bricks have an indefinite shelf life when stored cool and dry.