Grodan Expert Slab
Best stonewool slab for professional-grade large vine crop cultivation.
These stonewool slabs bring professional-grade consistency to your largest vine crops, offering a massive water buffer that survives the harshest mid-day sun. You trade the flexibility of traditional soil for a rigid, high-performance system that demands precision but rewards you with spectacular, commercial-quality yields.
$69.99
at
Perris Hydroponics
Who it's for
- Precision growers seeking total control over nutrient and pH levels
- Commercial farmers maximizing yield with large-scale hydroponic setups
- Hydroponic gardeners requiring uniform root zone hydration
Who should skip it
- Busy growers wanting a ready-to-use planting solution
- Eco-conscious gardeners prioritizing sustainable and biodegradable materials
- Budget-focused hobbyists starting small-scale home gardens
Performance breakdown
Root development
Vertical fiber orientation promotes rapid, healthy root penetration and expansion.
Water retention
Superior moisture buffering keeps plants hydrated during intense sun exposure.
Algae resistance
UV-resistant sleeve effectively blocks light to prevent unwanted algae growth.
Structural integrity
Robust stonewool density supports heavy vine crops without collapsing over time.
Ease of transplanting
Seamlessly integrates with Gro-Block systems for a stress-free transition.
Sustainability
Biodegradable sleeve design reduces environmental impact after the growing cycle.
Key Specs
Dimensions
6" x 3" x 36"
Quantity per Bag
12
Material
Stonewool
Sleeve Material
Biodegradable UV-resistant
Fiber Orientation
Vertical (except 12 in. slab which is horizontal)
Intended for
One large plant per Uni-Slab
Soil Type
Potting Mix
Volume
12.76 quarts
Moisture Retention Level
High
Drainage Level
Moderate Draining
Know before you buy
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