Search

Cultiwool 8" x 8" x 8" Growing Blocks (18 Blocks/Case)

Reduced Price:
Or
Pay as low as
$24995/Mo
for a term that suits you, up to 60 months. Learn More

🍃 Earn 250 points for shopping and get $2.49 off your next order. Join Harvest Club for free

To calculate 10 percent of a number, simply divide it by 10 or move the decimal point one place to the left. For example, 10 percent of 230 is 230 divided by 10, or 23.
pricePoints: 249.95
249.95,0
1
percentage: $2.49
rt:

🍃 Earn # points for shopping and get $2.49 off your next order. Join Harvest Club for free

MODEL: 03511000060
Need help deciding?

Expert (human) help, just a click away!

Cultiwool 8" x 8" x 8" Growing Blocks (18 Blocks/Case)

Struggling to find a growing medium that can keep up with your largest plants? The Cultiwool 8" x 8" x 8" Growing Blocks are engineered for maximum capacity, providing the perfect foundation for commercial-scale hydroponic systems and ensuring your plants have the space they need to thrive.

These premium stonewool blocks from Cultiwool are designed for serious growers seeking superior water management and a massive growing volume. Each 8-inch cube ensures rapid, uniform water absorption, delivering consistent moisture levels essential for healthy development. The innovative Donut Ring technology creates a perfect water chamber for precise dripper placement, while the cross grooves at the bottom enhance drainage and reduce ground contact, minimizing the risk of root pathogens. For starting your plants, consider using the compatible Cultiwool 1.5" Cubes before transplanting.

Wrapped in black and white foil to prevent algae growth, these blocks maintain a clean and stable root environment. Built with high-quality European stonewool, they offer the reliable, professional-grade performance needed for any large-scale operation. While these 8-inch blocks are ideal for mature plants, the Cultiwool 6" blocks offer a great alternative for medium-sized applications.

What's Included

  • 18 x Cultiwool 8" x 8" x 8" Growing Blocks

Features

🌱
Maximum Growing Volume

The 8" cube provides the largest available growing space, perfect for commercial-scale and high-capacity applications.

🎯
Donut Ring Technology

Industry-first water chamber ensures precise dripper placement and uniform moisture distribution throughout the block.

💧
Enhanced Drainage

Bottom grooves improve water flow and reduce ground contact, minimizing the risk of root disease from pathogens.

🛡️
Algae Prevention

Black and white foil wrapping blocks light to prevent unwanted algae growth and maintain a clean root zone.

🏆
Commercial-Grade Quality

Made from high-quality European stonewool for consistent texture and reliable performance in demanding operations.

Specifications

Specification Value
Material Premium Stonewool
Dimensions 8" x 8" x 8" (203mm x 203mm x 203mm)
Plug Hole Size 38mm / 40mm
Quantity per Case 18 Blocks
Special Features Donut Ring, Drainage Grooves, Black/White Foil
Selling Unit Case Only

FAQs

What are these 8x8x8 blocks best used for?+

They are ideal for large, mature plants in hydroponic systems, particularly for commercial growers who need maximum root volume and stability for high-value crops.

Do I need to prepare the Cultiwool blocks before use?+

Yes, it's essential to presoak the blocks in pH-adjusted water (typically pH 5.5-6.5) until they are fully saturated before transplanting your starter plants.

What size starter cube fits in these blocks?+

The blocks have a 38mm/40mm hole, making them perfectly compatible with most standard 1.5" starter cubes, including the Cultiwool 1.5" Cubes.

How does the Donut Ring technology work?+

The Donut Ring is a recessed water chamber on top of the block. It ensures your dripper stake stays perfectly centered and distributes water and nutrients evenly across the top surface, preventing channeling and dry spots.

Can these blocks be used for soil gardening?+

These blocks are specifically designed as a hydroponic growing medium. Their properties are optimized for soilless cultivation where you have precise control over water and nutrient delivery.

What makes Cultiwool a good choice for growers?+

Cultiwool is known for its high-quality European stonewool, which provides a consistent, inert substrate with excellent water retention and aeration. This reliability is crucial for achieving predictable and healthy plant growth.