• Coco Coir Blocks 4 × 5kg / 300L

    Four compact 5kg blocks provide approximately 300 litres of peat-free growing medium after hydration and loosening. Prepare one block at a time and keep the remainder dry.

    • Peat-free coir
    • 4 × 5kg blocks
    • Hydrate in batches
    • Container growing

    Prepare what you need. Store the rest dry.

    Four Coirology 5kg coco coir blocks — approximately 300L after hydration
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Coco Coir Blocks 4 × 5kg / 300L

Coco Coir Blocks 4 × 5kg / 300L

£58.10
£58.10
Imposte incluse. Spese di spedizione calcolate al check-out.

Four compressed 5kg coco coir blocks, each expanding to approximately 75 litres after hydration and loosening. Prepare individual blocks as needed for suitable pots and growing systems.

£58.10 per pack — approximately £14.53 per block.

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  • Peat-free

    Made from coconut husk.

  • Calcium buffered

    Prepared for nutrient management.

  • Moisture retention

    Coir holds water in the root zone.

  • Approx. 75L per block

    Around 300L from four blocks.

  • Flexible growing

    For suitable pots and systems.

ABOUT THIS ITEM

Product Details

  • 75L from each 5kg block — Each block expands to approximately 75 litres, giving around 300 litres from four blocks. Prepare individual blocks in a large tub with enough room for expansion.

  • 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.

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THE MATERIAL BEHIND THE PRODUCT

Thoughtfully made. Simply prepared.

Plan a larger planting scheme with four compact 5kg coir blocks, providing approximately 300 litres after hydration and loosening. Prepare one block at a time near your growing area and keep the remainder dry. Match the coir structure, feeding and watering to your plants rather than treating every pot in the same way.

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.

  • Adding water gradually to a large compressed coir block in a roomy garden 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

  • Detail view of one Coirology 5kg plain coco coir block; refer to the selected product for pack quantity

    Store unused blocks dry

    Keep compressed blocks protected from moisture. Prepare individual blocks as needed and leave the remainder dry.

  • Gardener carrying a small bucket of hydrated coir with both hands while the large mixing tub stays on the patio

    Plan the lifting

    Each dry block weighs 5kg; four blocks weigh 20kg before packaging. Use assistance for the full pack and move hydrated coir in small portions.

  • Preparing coir beside patio plants and moving a small scoop from the tub into a pot

    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

Block format4 × 5kg compressed coir blocks; 20kg before packaging
Expanded volumeApproximately 75L per block; 300L from four blocks
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 unused blocks dry and sheltered; prepare individual blocks as needed

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?

Each 5kg block expands to approximately 75 litres after hydration and loosening. Four blocks provide approximately 300 litres in total. Final volume depends on preparation.

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.