Coco Coir Brick for Plants 27 Pack - Compact Organic Potting Mix

In this review of the Coco Coir Brick for Plants 27 Pack, the bottom line is simple: this compressed coconut coir is best for home gardeners and seed starters who want a lightweight, low-EC, pH-balanced growing substrate that expands into a large volume. The reviewer found the bricks especially useful when mixed with potting soil or used for seedlings because each 1.4 lb brick expands several times, providing good water retention and aeration without adding salts. It is not a complete fertilizer, so users should plan to add nutrients for long-term pots.

Key Features

• High expansion: Each 1.4 lb brick expands to about 2.3 gallons, giving a lot of usable substrate from compact packages.
• 100% natural fibers: Made from coconut husk fiber, the coir supplies oxygen around roots while balancing moisture retention and drainage.
• Low EC and pH balanced: The low electrical conductivity and balanced pH reduce risk of salt stress and suit sensitive seedlings and transplants.
• Heat treated for safety: Bricks are heat treated to remove pests and harmful organisms, helping establish healthy plant starts.
• Easy to use: The compressed format is lightweight and simple to rehydrate in a large container, making storage and transport convenient.
• Sustainable substrate: Made from renewable coconut husk, this is an eco-friendly alternative to peat in many planting tasks.

Who It's For

This product suits container gardeners, seed and cutting growers, and anyone who wants a ready-to-use, renewable substrate that combines moisture retention with good aeration. It is especially helpful when space is limited because the bricks are compact for storage and expand to several quarts of coir for potting mixes.

Those who should look elsewhere include growers seeking a complete nutrient medium out of the bag or users who want instant high-nutrient potting soil; the bricks have low natural nutrients and are intended to be mixed with fertilizer or potting soil for long-term feeding.

Pros & Cons

Pros

• High expansion ratio delivers a lot of growing medium from each compact brick.
• Good moisture retention and aeration supports healthy root development in seedlings.
• Low EC and balanced pH reduce risk of salt buildup and stress on young plants.
• Heat treated and 100% natural, making it a safer, sustainable peat alternative.

Cons

• Low inherent nutrients mean you must add fertilizer or mix with nutrient soil for long-term growth.
• Some users report variable soak-up speed, so rehydration can require patience and a large container.

Specifications

Product form	Compressed coconut coir bricks
Count	27 bricks per pack
Weight per brick	1.4 lb (approx)
Expanded volume	About 2.3 gallons (9 quarts) per brick
Material	100% coconut husk fiber, organic
Treatment	Heat treated to remove pests
Electrical conductivity / pH	Low EC, pH balanced

Our Verdict

The Coco Coir Brick 27 Pack is a practical, sustainable option for seed starting and mixing into potting soil, offering strong moisture control and aeration at a good value. Gardeners who add nutrients or blend it into potting mixes will get the most from these bricks, while those expecting a ready-to-use, nutrient-rich soil should budget for fertilizer or a different product.

Frequently Asked Questions

How much does one brick expand?
One 1.4 lb brick expands to roughly 2.3 gallons or about 9 quarts after full hydration.

Do bricks contain nutrients?
No, the bricks have low natural nutrients and are intended to be mixed with nutrient soil or supplemented with fertilizer for ongoing plant feeding.

Are they safe for seedlings?
Yes, they are heat treated, low EC and pH balanced, making them suitable for seedlings and cuttings when properly rehydrated.