Coco Coir Brick 5kg – Buffered Coconut Coir Compost (Coco Peat) – Expands to 75L Peat-Free Growing Medium – pH-Balanced for Seeds, Plants, Hydroponics & Houseplants

This product is a raw coco coir brick — the ideal base substrate for growers who want to create their own custom growing mixes. Blend it with perlite, vermiculite, or your preferred amendments to suit any plant. Prefer a ready-made option? Our plant-specific growing mixes (coming soon) are pre-blended and ready to use straight from the bag.

One 5kg brick expands to 75 litres of premium, ready-to-use coco coir — calcium-buffered, peat-free.

Blue Apple Garden’s buffered coco coir is engineered for consistent results. Add 20 litres of clean water, allow 20–30 minutes to fully expand, and your growing medium is ready. No rinsing. No pre-treatment. No conditioning required.

Why Buffered Coco Coir?

Standard coco coir aggressively absorbs calcium and magnesium from your nutrient solution — starving plants before they establish. Our bricks are pre-saturated with calcium and magnesium during production, so those exchange sites are already occupied when the product reaches you. Your plants access nutrients from day one, with no lock-out and no adjustment period.

Key Features

• Expands to approximately 75 litres from one 5kg compressed brick
• Washed and calcium-buffered — flushes out excess salts and prevents nutrient lock-out from day one
• Stable pH 5.5–6.5, ultra-low EC — ready to use straight from the pack
• Naturally resistant to mould — supports healthy root development (natural lignin structure)
• Low sodium — gentle on salt-sensitive plants and seedlings
• Superior water retention and airy texture — keeps compost moist while preventing waterlogging
• 100% peat-free and biodegradable — made from renewable coconut husk fibre
• Compatible with all liquid nutrients, organic feeds, and hydroponic systems
• Dispatched from our UK warehouse within 1 working day
• Shrink film: LDPE ≥ 30% recycled — widely recyclable

How to Use

1. Place the brick in a large bucket or container.
2. Add 20 litres of clean water (warm water speeds expansion).
3. Wait 20–30 minutes while the brick swells (expands to 75L).
4. Fluff thoroughly with a fork or hand tool until light and even.
5. Use alone or blend with perlite (70:30 ratio) for improved drainage and aeration.
6. Begin feeding with a balanced nutrient solution from week one.

Suitable For

Containers and pots, raised beds, propagation trays, seedlings and cuttings, hydroponics (DWC, NFT, Dutch Bucket), and indoor growing environments.

Technical Specifications

• Net weight: 5kg compressed
• Expanded volume: approximately 75 litres
• pH: 5.5–6.5
• EC: Ultra-low
• Pre-buffered: Yes (calcium and magnesium)
• Format: Single compressed brick
• Shelf life: 24 months from manufacture when stored correctly

Prefer a Ready-Made Mix?

If you'd rather skip the blending, our plant-specific growing mixes are formulated for individual plant types — houseplants, tomatoes, herbs, orchids, cacti, and seed starting. Pre-blended, peat-free, and ready to use. View the range →