Grodan
Grodan® Stone Wool Growing Media Solutions
Grodan is a horticultural brand specializing in stone wool growing media designed for precision growing environments. Built to support consistent water distribution, strong root development, and controlled nutrient management, Grodan substrates help growers achieve reliable performance and repeatable results across modern cultivation systems.
Grodan® Improved Gro-Slabs™
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- Some options include pre-cut plant holes.
Grodan® Improved Gro-Block™ Hugo
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
Grodan® Improved Gro-Blocks™
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
Grodan® A-OK Starter Plug Pre-Filled Trays
The Grodan® tray comes prefilled with A-OK Starter Plugs™ for fast and easy propagation from seeds or cuttings prior to transplanting to Gro-Blocks™.
- Fits perfectly in most standard 1020 trays.
- Designed with a unique and convenient thumb slot to make removal easy and comfortable.
- Pre-cut and pre-filled into an insert of 50 1.5-inch AO plugs (1.4 x 1.4 x 1.9 inches).
- 30 inserts per carton (total of 1,500 plugs).
Grodan 1.5 in Pargro Plugs, 1.4 x 1.4 x 1.6 in (3.5 x 3.5 x 4 cm), Unwrapped Sheets in Carton
- Grodan® 1.5 inch Pargro® rockwool plugs.
- Dimensions: 1.4 x 1.4 x 1.6 in (3.5 x 3.5 x 4 cm).
- Unwrapped sheets in carton.
Grodan Pre-Cut, Pre-Filled Tray, A-OK 1.5 in Starter Plugs, No Hole (50 plugs/tray, 30 trays/case)
The Grodan® tray comes prefilled with A-OK Starter Plugs™ for fast and easy propagation from seeds or cuttings prior to transplanting to Gro-Blocks™.
- Fits perfectly in most standard 1020 trays.
- Designed with a unique and convenient thumb slot to make removal easy and comfortable.
- Pre-cut and pre-filled into an insert of 50 1.5-inch AO plugs (1.4 x 1.4 x 1.9 inches).
- 30 inserts per carton (total of 1,500 plugs).
- No holes.
Grodan Improved Gro-Block GR6.5 Small, 4 x 4 x 2.5 in (10 x 10 x 6.5 cm), No Wrap (216 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 4 x 4 x 2.5 in (10 x 10 x 6.5 cm) block.
Grodan Gro-Smart Tray Insert (EA)
- Provides a home for Grodan® Mini-Blocks™ and Gro-Blocks™.
- Features double-sided design for various Grodan media.
- Mesh side fits sheets of A-OK Mini-Blocks or Gro-Blocks.
- 78-cell side fits 1.5-inch A-OK Starter™ Plugs or round Macroplugs™.
- Fits in a standard 1020 flat and elevates media from the bottom.
- Easily sanitized, dishwasher safe hard-plastic tray.
- Exclusively designed and manufactured for Grodan.
Grodan Gro-Slab Expert, 8 x 3 x 36 in (20 x 7.5 x 90 cm) (12 / case)
- Used for final stage planting with growing blocks.
- Recommended for large, long-term crops with extensive roots like peppers, tomatoes, or cucumbers.
- Known for its fast drainage due to vertical fibers, popular among hydroponic hobbyists.
- Features a special wet/dry design with a thicker top layer that stays wetter and a bottom layer that remains drier, ensuring even moisture distribution.
- Come in UV-resistant poly sleeves for ease of use.
- 8 x 3 x 36 in (20 x 7.5 x 90 cm) slab.
Grodan Improved Gro-Block GR6.5 Small, 4 x 4 x 2.5 in (10 x 10 x 6.5 cm), Wrapped (216 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 4 x 4 x 2.5 in (10 x 10 x 6.5 cm) block.
Grodan Macroplugs 1.5 in (46 mm), Round w/ Slit, Bulk (2,000 / case)
- Macroplugs™ from Grodan® are designed for starting seeds and rooting cuttings.
- Plugs are round, 1.5-inch (46 mm), with a slit for easy plant cutting insertion.
- Fit perfectly into Gro-Block™ for seamless transplanting.
- Use with individual-cell trays like the Gro-Smart Tray Insert for best results.
- Grodan stone wool products offer consistent, reliable propagation.
- Uniform density and fibrous structure support manual and mechanical processing.
- Balanced water and nutrient distribution promotes optimal rooting and early growth.
- Dimensions: 1.5 in (46 mm).
Grodan Improved Mini-Block MM 40/40, 1.5 x 1.5 x 1.5 in (4 x 4 x 4 cm), Wrapped (2,250 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 1.5 x 1.5 x 1.5 in (4 x 4 x 4 cm) mini block.
Grodan Pre-Cut, Pre-Filled Tray, A-OK 1.5 in Starter Plugs, No Wrap (50 plugs/tray, 30 trays/case)
The Grodan® tray comes prefilled with A-OK Starter Plugs™ for fast and easy propagation from seeds or cuttings prior to transplanting to Gro-Blocks™.
- Fits perfectly in most standard 1020 trays.
- Designed with a unique and convenient thumb slot to make removal easy and comfortable.
- Pre-cut and pre-filled into an insert of 50 1.5-inch AO plugs (1.4 x 1.4 x 1.9 inches).
- 30 inserts per carton (total of 1,500 plugs).
- No wrap.
Grodan A-OK Starter Plugs 1.5" (36/40) Wrapped (98 / sheet, 30 / case)
- A-OK Starter Plugs™ are designed for starting seeds and rooting cuttings.
- Plugs are 1.5 inches (36 mm) and fit into a 1020 tray.
- Crafted to streamline growing for both beginners and seasoned growers.
- Made from Grodan® stone wool, known for consistency and reliability.
- Features uniform density and fibrous structure for easy processing.
- Ensures balanced water and nutrient distribution for optimal rooting.
- Supplied in a shrink-wrapped sheet with instructions.
- Dimensions: 1.5 in (36 mm).
Grodan Improved Gro-Block GR22.5 Jumbo, 6 x 6 x 4 in (15 x 15 x 10 cm), With Hole (64 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 6 x 6 x 4 in (15 x 15 x 10 cm) block.
Grodan Improved Gro-Block GR4 Small, 3 x 3 x 2.5 in (7.5 x 7.5 x 6.5 cm), Wrapped (384 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 3 x 3 x 2.5 in (7.5 x 7.5 x 6.5 cm) block.
Grodan Improved Gro-Block GR5.6 Large, 3 x 3 x 4 in (7.5 x 7.5 x 10 cm), Wrapped (256 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 3 x 3 x 4 in (7.5 x 7.5 x 10 cm) block.
Grodan Improved Gro-Block GR32 Hugo, 6 x 6 x 6 in (15 x 15 x 15 cm), Loose Pallet (512 / skid)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 6 x 6 x 6 in (15 x 15 x 15 cm) block.
Grodan Improved Gro-Slab 6" x 3" x 36" (15 x 7.6 x 91.4 cm) (12 / case)
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- 6 x 3 x 36 in (15 x 7.6 x 91.4 cm) slab.
Grodan Gro-Block Improved GR10 Large 4" x 4" x 4" (10 x 10 x 10 cm) No Wrap (144 / Case)
- Formulated with an advanced wetting agent and optimized wool structure.
- New density and hydrophilic technology improve water distribution and root development.
- Delivers consistent results for indoor and greenhouse commercial grows.
- Optimal fiber structure ensures crop uniformity and even water content (WC) and electrical conductivity (EC) distribution.
- Enables efficient and sustainable use of the entire substrate volume.
- Supports a well-defined root system for higher water and nutrient uptake.
- Dimensions: 4 x 4 x 4 in (10 x 10 x 10 cm).
Grodan Improved Gro-Slab, 6x3x36 in w/Three 4 in Pre-Cut Squares, Bag (12/Bundle, 10 Bales/Pallet)
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- 6 x 3 x 36 in (15 x 7.6 x 91.4 cm) slab.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Improved Gro-Slab, 8 x 3 x 36 in (20 x 7.6 x 91.4 cm) w/ Three 4 in Pre-Cut Squares (Bag)
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- 8 x 3 x 36 in (20 x 7.6 x 91.4 cm) slab.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Gro-Slab Improved 6" x 3" x 40" (15.25 x 7.6 x 102 cm) (12 / pack)
- Formulated with an advanced wetting agent and optimized wool structure.
- Delivers consistent results for indoor and greenhouse commercial grows.
- Re-saturates quickly with uniform WC and EC distribution.
- Offers a wide control range for simple irrigation strategies.
- Provides a reliable substrate for easy irrigation and consistent cultivation.
- Developed in collaboration with Wageningen University.
- Successfully trialed by leading cultivation facilities in North America.
- Dimensions: 6 x 3 x 40 in (15.25 x 7.6 x 102 cm).
Grodan Gro-Block Delta Big Mama 8" x 8" x 8" (20 x 20 x 20 cm) (18 / Case)
- Big Mama is Grodan®'s largest block ever produced.
- Contains more than twice the wool of the Hugo Block.
- Large enough to support a plant for its entire life.
- Gro-Blocks are similar to plant containers.
- Available in various sizes, like a 3-inch Gro-Block for a 3-inch pot.
- Large Gro-Blocks can support full growth of small plants.
- Holes are perfectly sized for 1.5-inch starter plugs.
- Packs come with clear instructions.
- Dimensions: 8 x 8 x 8 in (20 x 20 x 20 cm).
Grodan Improved Gro-Slab 8" x 3" x 36" (20 x 7.6 x 91.4 cm) (12 / case)
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- 8 x 3 x 36 in (20 x 7.6 x 91.4 cm) slab.
Grodan Improved Gro-Block GR7.5 Medium, 4 x 4 x 3 in (10 x 10 x 7.5 cm), Wrapped (192 / case)
- Formulated with an advanced wetting agent and optimized wool structure.
- Optimal fiber structure and physical properties ensure crop uniformity.
- Even WC and EC distribution.
- Greatest steering capabilities available.
- Efficient substrate volume use.
- Promotes well-defined root system with higher capacity for water and nutrient uptake.
- Consistent and outstanding results for controlled-environment indoor and greenhouse commercial grows.
- 4 x 4 x 3 in (10 x 10 x 7.5 cm) block.
Grodan A-OK 50/40 2 in (50 mm) Starter Plugs, Wrapped (50/Sheet, 30 / case)
- Stone wool plugs for seed starting and rooting plant cuttings.
- Square plugs connected in a sheet to fit a 1020 tray.
- Crafted for convenience, efficiency and reliability.
- Uniform density, firmness, and fibrous structure.
- Enables balanced water and nutrient distribution.
- 2 inch (50 mm) plugs.
- 50 plugs per sheet.
- Wrapped.
Note: Item Q100445 supplied without shrink wrap.
Grodan Cress Plate 0.25" x 10" x 20" (0.64 x 25 x 51 cm) Sheet (95 / Case)
- Cress Plates from Grodan® are ideal for growing microgreens.
- Quarter-inch thick, 10- by 20-inch stone wool mats.
- Designed to fit seamlessly in a 1020 tray.
- Provides an ideal environment for microgreen cultivation.
- 95 sheets per case for convenience and efficiency.
- Suitable for both professional chefs and home gardeners.
- Dimensions: 0.25 x 10 x 20 in (0.64 x 25 x 51 cm).
Grodan Gro-Wool Absorbent Granulate 45 lbs (20 kg) (1 each)
- Ideal for both facilities and home hobby growers.
- It supports productive indoor gardens using container systems.
- Can be used as a stand-alone loose fill growing media.
- Can also be mixed with Grodan Grow-Chunks.
Grodan Grow-Chunks, 3/4 inch (2 cu ft bag) (3 bags / case)
- Grodan® Grow-Chunks are a larger-size 3/4 inch alternative to Grodan 1/2 inch Grow-Cubes.
- Designed to offer increased moisture and nutrient retention.
Grodan Improved Gro-Slab 6" x 4" x 36" (15 x 10 x 91.4 cm) (12 / case)
- Advanced Wetting Agent ensures more uniform water distribution throughout the slab.
- Enable a multi-faceted irrigation strategy with water volume variations between 55% and 78%.
- Enhanced capillary action retains moisture more evenly across the entire slab.
- Distributes WC and EC evenly, providing optimal steering capabilities.
- Growers gain better control of plant balance throughout the crop cycle with precise WC and EC adjustments.
- Stone wool fibers do not bind nutrients and eliminate the need for flushing at the start of cultivation.
- Initial targeted water and nutrient application promotes sustainable water and fertilizer use.
- Facilitate optimal crop steering for healthy plants and higher yields.
- 6 x 4 x 36 in (15 x 10 x 91.4 cm) slab.
Grodan Macroplugs 1.5 in (46 mm) Round w/ Slit (50 / bag, 35 bags / case)
- Macroplugs™ from Grodan® are designed for starting seeds and rooting cuttings.
- Plugs are round, 1.5-inch (46 mm), with a slit for easy plant cutting insertion.
- Fit perfectly into Gro-Block™ for seamless transplanting.
- Use with individual-cell trays like the Gro-Smart Tray Insert for best results.
- Grodan stone wool products offer consistent, reliable propagation.
- Uniform density and fibrous structure support manual and mechanical processing.
- Balanced water and nutrient distribution promotes optimal rooting and early growth.
- Dimensions: 1.5 in (46 mm).