VIVOSUN Coco Coir Brick 11 lbs — 100% Natural Compressed Coconut Fiber, Low-EC, High Water Retention

VIVOSUN 11lbs Coco Coir Brick is a compact, 100% natural compressed coconut fiber block that expands with water into a loose, well-aerated growing medium for containers, seed starts, and soil improvement.

This coco coir brick is made from rinsed, low-EC coconut husk fiber and comes compressed for easy storage and transport. When rehydrated it produces a lightweight, water-retentive substrate with good aeration and drainage. The brick is sold in a carry-handle bag and is convenient for indoor and outdoor gardeners who want a renewable, peat-free alternative for potting mixes, seed starting, and soil amendment.

How do I rehydrate and prepare the 11lbs coir brick?

Preparation is simple: place the compressed brick in a large container and add water. Allow time for the brick to fully expand, then fluff the material before use.

• Add about 9–11 gallons (34–42 liters) of water per 11lbs brick for full expansion.
• Let it soak 15–45 minutes, then break apart and fluff to reach a crumbly texture.
• Adjust pH or nutrients as needed before planting by rinsing or buffering if desired.

What growing tasks does this coco coir brick work best for?

The brick is versatile across many gardening uses: it’s ideal for potting mixes, seed and cutting propagation, amending heavy soils, and hydroponic media blends. It improves drainage while retaining moisture for healthy root systems.

• Mix with compost or potting soil to lighten clay and improve structure.
• Use alone or with perlite for seed starting and cuttings.
• Blend into containers for vegetables, herbs, flowers, and microgreens.

How much expanded coir will one 11lbs brick yield and how do I measure it?

An 11lbs compressed brick yields a substantial volume of expanded coir suitable for multiple containers or bed amendments. Volume depends on how much water you use and how loosely you fluff the fiber.

• Typical expansion provides several cubic feet of fluffy coir—enough for many pots and small beds.
• Use roughly 9–11 gallons of water per brick to achieve recommended texture.
• For dense mixes, combine with perlite or compost to reach desired volume and drainage.

Is this coco coir brick ready-to-use and what maintenance does it need?

The brick is rinsed and low in soluble salts but some growers buffer coir or add nutrients depending on their system. Once expanded and mixed, routine watering and nutrient management follow your usual gardening practices.

• Rinsed and low-EC, suitable for many applications straight after expansion.
• Buffering with calcium/magnesium is optional for sensitive plants or hydroponics.
• Top up or replace coir in pots over seasons as it gradually breaks down.

Who is this for: gardeners, growers, and hobbyists seeking a renewable, peat-free growing medium that balances water retention with aeration. It suits indoor houseplant enthusiasts, container vegetable and herb growers, seed starters, and anyone improving heavy soils or building custom potting mixes. The compact brick format benefits people with limited storage or those who need portable planting material for projects, workshops, or seasonal gardening.