Coco Coir bricks, per brick

Coco Coir Bricks

What they are

• Compressed blocks of coconut coir (coconut husk fibers and pith).

• Lightweight, dust-free when pre-washed and buffered; expands when hydrated.

• Available in various sizes (250 g to 5 kg+ bricks and larger blocks).

Benefits

• Excellent water retention with good aeration — holds moisture while allowing oxygen to roots.

• pH near neutral to slightly acidic (usually 5.5–6.8) and relatively stable after buffering.

• Sustainable alternative to peat moss: renewable and biodegradable.

• Sterile and free of weeds, pests, and pathogens when properly processed.

• Good for seed starting, potting mixes, soil amendment, hydroponics, and container gardening.

Types / Grades

• Coir pith (coco peat): fine particles with very high water-holding capacity.

• Coir fiber: longer strands for improved drainage and structure; used in mixes or liners.

• Blend bricks: combinations of coir pith and fiber to balance water retention and aeration.

How to use

1. Hydrate: Place brick in a bucket or tub. Add warm water slowly — typical expansion ratios are 1:3 to 1:8 (brick:water) depending on density and desired consistency. Allow 15–60 minutes; break apart and knead to fully rehydrate.

2. Buffering: If using for sensitive plants or long-term use, rinse or pre-buffer with calcium and magnesium solution or a commercial coir buffer to remove excess salts from processing.

3. Mix ratios:

   • Seed starting: mostly fine coco peat or 100% buffered coir.

   • Potting mix: 40–60% coir + compost + perlite/vermiculite for drainage.

   • Soil amendment: 20–40% coir mixed into heavy soils to improve structure.

   • Hydroponics: 100% buffered coir, rinsed and prepared per system needs.

4. Storage: Keep dry and in a sealed container or bag to prevent mold and rehydration.

Tips & Considerations

• Check EC (electrical conductivity) for salt content before use; acceptable EC typically under 0.8 mS/cm for most uses after buffering/rinsing.

• Add calcium and magnesium if using coir exclusively to avoid cation imbalance in long-term grows.

• Coir decomposes slowly — it’s more durable than peat but will break down over multiple seasons; refresh mixes as needed.

• Avoid using unbuffered coir for salt-sensitive seedlings and plants.

• For improved drainage, blend coir with coarse fiber or perlite.

Common Uses

• Seed starting and cuttings

• Indoor container plants and hanging baskets

• Outdoor container gardening and raised beds

• Hydroponic and soilless systems

• Soil conditioning for clay and compacted soils

Sizing guide (approximate water expansion)

• 250 g brick → ~1–2 liters hydrated

• 650 g brick → ~3–5 liters hydrated

• 5 kg block → ~25–40 liters hydrated Actual yield varies by brick density.

Safety & Disposal

• Non-toxic and biodegradable; dispose in compost or garden beds.

• Wear a dust mask when handling dry bricks if dusty; wet bricks are low dust.

• Store out of direct sunlight and protected from rodents and moisture.

Quick buying checklist

• Buffered vs. unbuffered (choose buffered for long-term/hydroponic use)

• EC/salt level listed

• Coir/fiber ratio if you need more drainage

• Brick weight and expected hydrated volume

• Organic certification if required

Questions we can help with

• Which brick size fits your container or bed?

• How to buffer and test EC at home

• Custom potting mix recipes using coco coir

Big D’s Trees and Grow Supply offers a selection of coco coir bricks and can help you choose the right type and size for your gardening project.