Growing Tips · Practical Guide

How to Hydrate a Coco Coir Brick

Turn one compressed 5kg block into 70–75 litres of loose growing medium in about 20 minutes—without dry pockets, excess water or unnecessary nutrient changes.

Hydrating a coco coir brick is simple, but the way water is added affects how evenly the block expands. Pouring too quickly can leave a wet outer layer and a hard centre. Using far more water than needed can make handling messy and dilute the first runoff test.

For Avee’s 5kg compressed coco coir blocks, start with 20–25 litres of water, allow approximately 20 minutes, then loosen the expanded material. One block produces about 70–75 litres of ready-to-use substrate.

5kgCompressed block

20–25LStarting water

~20 minHydration time

70–75LExpanded volume

What You Need

One 5kg coco coir block
A clean tub, tote, trough or mixing area large enough for at least 75 litres
20–25 litres of clean water to start
A watering can or hose with controlled flow
Gloves and a hand fork, rake or mechanical mixer for larger batches
EC and pH meters when the coir will be used in a precision growing program

Five Steps to Expand a Coco Coir Brick

STEP 1

Choose a container with room to expand

Place the block flat in a clean container. Do not use a tight bucket: the block expands in every direction and needs enough room to be turned and fluffed.

STEP 2

Add water slowly and evenly

Distribute 20–25 litres over the top and sides instead of flooding one spot. Warm or ambient water can speed absorption. Avee’s blocks are pre-buffered, so plain water is sufficient for expansion; do not automatically add Cal-Mag during hydration.

STEP 3

Wait about 20 minutes

The outside layers expand first. Let water travel into the centre before breaking the block apart. If a dry core remains after the first soak, add small amounts of water to that area rather than soaking the entire batch again.

STEP 4

Break apart and fluff the coir

Separate remaining compressed pieces by hand, fork or mixer. Fluffing restores pore space and distributes moisture. The finished material should feel evenly damp, loose and springy—not soupy or compacted.

STEP 5

Check the medium before planting

For commercial, hydroponic or sensitive crops, check runoff EC and pH using the same method used by your operation. Avee’s 5kg blocks are specified at EC below 0.5 mS/cm and pH 5.5–6.5, but incoming-batch checks remain good production practice.

Common Hydration Mistakes

Adding all the water in one place: creates a saturated edge and a dry core.
Using a container that is too small: compresses the expanded coir and makes mixing difficult.
Planting before the centre expands: produces uneven moisture and fill density.
Adding nutrients automatically: can raise EC unnecessarily when the product is already washed and buffered.
Skipping the final check: prevents the grower from catching water-source or batch differences before planting.

How Much Coir Will One Block Fill?

A fully expanded 5kg Avee block produces approximately 70–75 litres. That is enough for about seven 10-litre containers, fifteen 5-litre containers or one larger raised-bed blend requiring roughly 75 litres of coir. Allow for settling and the volume occupied by perlite, bark or other blend components.

Commercial operations needing repeated batches should standardize water volume, soak time and mixing equipment. For higher-volume substrate handling, compare bulk coir bales or pre-filled coco coir grow bags.

Frequently asked questions

Coco Brick Hydration FAQs

How much water does a 5kg coco coir brick need?

Start with 20–25 litres for Avee’s 5kg block. Add water gradually and use small extra amounts only if a dry centre remains.

How long should coco coir soak?

Allow approximately 20 minutes for a 5kg Avee block. Larger bales require more time and mechanical handling.

Should I add Cal-Mag while hydrating coco coir?

Not automatically. Avee’s blocks are calcium-buffered before shipping, so plain water is sufficient for expansion. Match later nutrition to the crop, water analysis and production program.

Can I store hydrated coco coir?

Use it promptly when possible. If it must be stored, keep it clean, covered and well aerated; avoid standing water and contamination from soil or tools.

Need Blocks for a Commercial Grow?

Avee supplies single blocks, pallet quantities and container orders across Canada and the United States, with Mexico lanes expanding.

View 5kg Coco Coir Block Specifications