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
Lawn
Seed cover / top dressing
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 · Usually dispatched within 1 working day
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. Orders are usually dispatched within 1 working day (Monday–Friday) and most arrive 2–3 working days after dispatch.
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 a shelf life of 24 months from manufacture when stored cool and dry.