• Buffered Coco Coir 5kg / 75L

    Washed, calcium-buffered coir in a compact 5kg block. Approximately 75L when hydrated and loosened.

    • Peat-free coir
    • Calcium buffered
    • Hydrate before use
    • Container growing

    Buffered for your growing programme.

    Coirology buffered front packshot with clearly defined carry handle
  • Conceptual illustration explaining soluble-salt washing and calcium buffering of coir.
  • Four steps for hydrating and loosening a 5kg buffered coco coir block.
  • Coirology guide to coconut-husk coir, water retention and peat-free growing mixes
  • Coirology coir applications for seed starting, houseplants, raised-bed blends and cuttings
  • Coirology coir moisture care: retain moisture, blend to suit plants and check before watering
  • Coirology compact coir storage: hydrate what you need and keep the rest dry
  • Coirology coir uses in potted-plant mixes, propagation blends and worm-bin bedding
  • Coirology coir applications from gardens to selected habitats, with additive-free and species-specific guidance
  • Buffered coco coir for herbs, leafy greens, strawberries and container growing
  • Buffered coco coir moisture care, calcium buffering, drainage and plant-appropriate feeding
  • One 5kg buffered coco coir block: dry storage, hydration and loosening before planting
  • Buffered coco coir for herbs, strawberries, leafy greens and suitable propagation blends
  • Buffered coco coir applications for herbs, berries, protected cultivation, pots and flowers
1 14

Buffered Coco Coir 5kg / 75L

Buffered Coco Coir 5kg / 75L

£15.99
£15.99
Taxes included. Shipping calculated at checkout.

A peat-free, washed and calcium-buffered coco-coir block for container growing and suitable hydroponic systems. One 5kg block expands to approximately 75 litres after hydration.

Build your growing mix around the crop, container and watering system. Buffering prepares the coir for nutrient management; it does not replace a complete feeding programme.
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa
  • Free UK delivery on orders £25 and over.
  • 30 day returns
  • Secure checkout

England & Wales: Next working day — order before 3pm.

Northern Ireland & Scotland: 2–3 working days.

View full details

  • Peat-free

    Made from coconut husk.

  • Calcium buffered

    Prepared for nutrient management.

  • Moisture retention

    Coir holds water in the root zone.

  • 5kg / approx. 75L

    Compact before hydration.

  • Flexible growing

    For suitable pots and systems.

ABOUT THIS ITEM

Product Details

  • One block. Around 75L. — A compressed 5kg block expands to approximately 75 litres when hydrated and loosened. Allow sufficient space in your tub for the material to open out fully.

  • Washed and buffered — Washing reduces soluble salts, while calcium buffering treats exchangeable ions held by the coir. These are separate steps in preparing the growing medium.

  • Plan your plant nutrition — Buffering is not a complete fertiliser programme. Choose a suitable feed for your crop and water supply, then adjust it to the plant’s stage of growth.

  • Build the right structure — Use alone where suitable, or blend with coir chips or other appropriate components. Match the texture to your crop, container depth and watering approach.

  • Prepare before planting — Hydrate according to the pack, loosen all compacted areas and check moisture throughout. Fill a container with drainage holes without pressing the coir too firmly.

  • Monitor as plants grow — Check moisture within the pot rather than watering by the calendar alone. In hydroponic systems, monitor the nutrient solution and drainage as part of routine care.

Delivery information Returns policy

THE MATERIAL BEHIND THE PRODUCT

Thoughtfully made. Simply prepared.

Prepare a generous volume of growing medium from one compact block. Hydrate close to your planting area, loosen thoroughly and use the coir on its own or in a crop-appropriate blend.

Washing reduces soluble salts. Calcium buffering addresses exchangeable ions held by the coir, helping reduce nutrient imbalances as feeding begins. Match nutrition and irrigation to your plants.

Explore coconut coir
Planting a basil seedling into hydrated coco coir
Illustration of vegetables and herbs growing in a timber raised bed

Find the right application.

  • Vegetables and herbs in containers
  • Strawberries in a suitable growing mix
  • Coir-based hydroponic systems
  • Greenhouse pots and planters
  • Blending with coir chips or other suitable components
  • Propagation where texture and nutrient levels suit the crop

How to use

Prepare, use and care for your substrate.

  • Illustration of water being added to a compressed coir block in a preparation tub 1

    Hydrate

    Place the block in a large tub. Add water gradually following the pack directions and allow it to expand.

  • Illustration of loosening hydrated coconut coir by hand in a preparation tub 2

    Loosen

    Break up softened areas by hand until moisture and texture are even. Do not leave a dry core.

  • Planting a basil seedling into hydrated coco coir 3

    Prepare and plant

    Choose your crop-appropriate mix, fill a draining container and plant at the correct depth.

  • Watering a basil plant growing in coco coir 4

    Water and feed

    Water in, let excess drain and begin a feeding programme suitable for the crop and system.

  • Checking moisture in coco coir beside a potted basil plant 5

    Monitor

    Check root-zone moisture and plant growth. Review nutrition and irrigation as conditions change.

PRACTICAL PREPARATION

Handling & storage

  • BUFFERED COCO COIR 5KG / 75L

    Store it compactly

    Keep the dry block protected from moisture until needed. Its compact format reduces storage space before hydration.

  • Illustration of loosening hydrated coconut coir by hand in a preparation tub

    Plan the lifting

    The dry block weighs 5kg, and hydrated coir is heavier. Use a stable work surface and lifting assistance where needed.

  • Illustration of water being added to a compressed coir block in a preparation tub

    Prepare near the plants

    Hydrate close to your growing area. Move the expanded coir in small portions instead of lifting a full, wet tub.

Technical specifications

Product formatOne compressed 5kg block
Expanded volumeApproximately 75L after hydration and loosening
Base materialPeat-free coconut coir
ProcessingWashed and calcium buffered
NutritionUse a complete feeding programme appropriate to the crop
PreparationHydrate and loosen before use; follow pack directions
StorageKeep the unhydrated block dry and sheltered

Substrate Science

Coir holds water within its fine structure, while larger pores provide air after drainage. Particle mix, container depth and irrigation influence the balance; avoid compacting the medium.

Coir also exchanges positively charged nutrients at its binding sites. Calcium buffering changes the ions held there. Washing and buffering are different processes, and neither guarantees the correct nutrient balance for every crop.

Explore Substrate Science
Illustrative cutaway showing a flowering plant and its roots in a pot of growing medium

  • Water and air

    Texture, container shape and irrigation work together.

  • Ion exchange

    Buffering changes ions held at coir exchange sites.

  • Crop nutrition

    Use a feed suited to your crop and growing system.

Product FAQ

What does buffered mean?

Calcium buffering changes the exchangeable ions held by coir. It helps manage the interaction between the substrate and your nutrient solution; it does not supply a complete crop feed.

Is washing the same as buffering?

No. Washing removes soluble salts with water. Buffering treats ions held on exchange sites in the coir. This product is supplied washed and buffered.

How much growing medium will I get?

One 5kg block makes approximately 75 litres. Hydration and how fully you loosen the coir affect the final volume.

Should I add fertiliser?

Plan a suitable feeding programme for your plants. Buffering does not replace balanced nutrition. Follow your fertiliser instructions and account for your water quality.

Can I add coir chips or perlite?

Yes, where they suit the crop and container. Coarser components can alter drainage and air space, but the right blend depends on particle size, packing and irrigation.

Is it suitable for every plant?

No single mix suits every plant. Check the crop’s texture, acidity and nutrition needs. For specialist or salt-sensitive crops, confirm the relevant product specification before use.