GROW!T Organic Coco Coir Block
Best organic growing medium for indoor and hydroponic gardeners.
Enhance your gardening with the GROW!T Organic Coco Coir Mix Block, designed to promote vigorous root development for a variety of plants. This versatile mix is perfect for both indoor and outdoor gardening, including hydroponic systems. When hydrated, each lightweight block expands to over 2.5 cubic feet, offering an easy-to-handle and store planting medium. Its balanced air-to-water ratio ensures excellent drainage while retaining essential moisture, making it an ideal choice for organic growers seeking an alternative to traditional potting soil.
$16.00
Owner Satisfaction
4.6
/ 5
Category Rank
516
/ 1247
#516 in Soil
Price vs Category Average
-68%
Below average
Block Weight
9.84.5
/ lb / kg
Who it's for
- Eco-conscious gardeners seeking sustainable alternatives to peat moss
- Gardeners focused on healthy root development and plant vigor
- Urban growers with limited storage space for gardening supplies
Who should skip it
- Botanists growing delicate seedlings sensitive to mineral salt levels
- Beginners preferring a low-maintenance, pre-fertilized potting soil
- Impatience-prone growers wanting to plant immediately without prep time
Performance breakdown
Expansion Efficiency
Rapidly transforms into a substantial volume of usable planting medium.
Root Aeration
Superior structure promotes oxygen flow for vigorous, healthy root systems.
Moisture Retention
Balances water holding capacity perfectly to prevent root rot issues.
Storage Convenience
Compact, lightweight block design saves significant space in your shed.
Hydroponic Versatility
Clean, inert composition makes it a top-tier choice for hydroponic setups.
Organic Integrity
Certified organic material ensures a clean start for sensitive edible crops.
Key Specs
Block Weight
9.8 lb / 4.5kg
Expands to 2.5 cu ft of wetted coir
Organic
True
Weight
9.8 pounds
Intended Use
Potting, Vegetable Garden, Flower Bed
Soil Type
Potting Mix, Compost
Primary Amendment
Coconut Coir
Drainage Level
Retains Moisture
Features
- Promotes healthy root growth
- Suitable for indoor and outdoor use
- Ideal for hydroponics systems
- Lightweight and easy to store
- High air to water ratio
- Retains water and improves aeration
- Suitable for organic growers
What customers say
Consumers consistently praise the exceptional quality and remarkable ease of use of the GROW!T Organic Coco Coir Block. Gardeners appreciate how quickly the block hydrates and expands, making preparation simple and mess free. The coir is frequently noted for its cleanliness and low salt content, leading directly to healthier root development and vigorous plant growth. This product delivers outstanding performance and clear value, establishing itself as a reliable foundation for successful gardening projects.
Know before you buy
To fully expand the 9.8 lb block, you will need approximately 4 to 5 gallons of water. Place the block in a large container, add the water, and allow it to soak for about 15 to 20 minutes until it reaches its full volume of 2.5 cubic feet.
Yes, it is suitable as a standalone medium, especially for hydroponic systems. However, if you are using it for traditional container gardening, many growers prefer to mix it with perlite or compost to further customize drainage and nutrient retention.
No, this is a pure organic coconut coir product and does not contain added fertilizers. Because it is inert, you will need to add your own liquid nutrients or organic amendments to support plant growth throughout the season.
Coco coir is naturally slightly acidic, typically ranging between 5.5 and 6.5 pH. It is generally safe for most plants, but it is always good practice to check the pH of your water and nutrient solution before feeding.
Yes, you can reuse coco coir, but it is recommended to sterilize it first to remove any remaining root matter or potential pathogens. Over time, the physical structure of the coir will break down, so you may need to mix in fresh material after a few cycles.
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