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.
Featured products
Grodan® Improved Gro-Slabs™
P_00206
- 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
P_00207
- 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™
P_00205
- 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
P_00696
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® A-OK Starter Plugs™
P_00202
- 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.
- Available wrapped or unwrapped.
Grodan® Macroplugs™
P_00209
- 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® Expert Gro-Slabs™
P_00203
- 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.
- Come in UV-resistant poly sleeves for ease of use.
Grodan® Improved MM Mini-Blocks
P_00208
- 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® Pargro® Blocks
P_00702
- Pargro offers Grodan's industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
Grodan® Pargro® Plugs
P_00703
- Pargro offers Grodan's industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
Grodan® Pargro® Slabs
P_00701
- Pargro offers Grodan's industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
Grodan Gro-Block Improved GR32 Hugo 6" x 6" x 6" (15.25 x 15.25 x 15.25 cm) (64 / Case)
Q100439
- 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: 6 x 6 x 6 in (15.25 x 15.25 x 15.25 cm).
Grodan A-OK Starter Plugs 1.5" (36/40) No Wrap (98 / sheet, 30 / case)
Q100444
- 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.
- Dimensions: 1.5 in (36 mm).
Grodan Gro-Slab Improved 8" x 3" x 40" (20 x 7.6 x 102 cm) (12 / pack)
Q100438
- 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: 8 x 3 x 40 in (20 x 7.6 x 102 cm).
Grodan A-OK Improved 1.5 in (36 mm) Starter Plugs, Loose in Carton (2,310 plugs)
Q112735
Grodan® A-OK Improved Starter Plugs™ for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks™. The plugs come loose in a carton for those who prefer to saturate individually.
- Easy to use with propagation trays.
- Shipped as individual loose AO plugs (1.4x1.4x1.6) bulk in the carton (2,310).
- No shrink-wrap.
Grodan Improved Gro-Slab, 6 x 4 x 36 in (15 x 10 x 91.4 cm) w/ Three 4 in Pre-Cut Squares (Bag)
Q112760
- 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.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Gro-Block Improved GR6.5 Small, 4 x 4 x 2.5 in (10 x 10 x 6.5 cm) w/ Hole, Loose on Pallet
Q112764
- 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.
- Loose on pallet.
Grodan Gro-Block Improved GR22.5 Jumbo, 6x6x4 in (15x15x10 cm) w/ Hole, Loose on Pallet (704 pcs)
Q112765
- 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.
- Loose on pallet.
Grodan Improved Gro-Slab, 12 x 3 x 36 in (30.5 x 7.6 x 91.4 cm) w/ Three 6 in Pre-Cut Squares (Bag)
Q112763
- 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.
- 12 x 3 x 36 in (30.5 x 7.6 x 91.4 cm) slab.
- Features three 6 inch (15 cm) pre-cut squares.
Grodan Pargro Slab, 36 x 8 x 3 in (91.4 x 20 x 7.6 cm) w/ Three 4 in Pre-Cut Squares (Bag)
Q112804
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 8 x 3 in (91.4 x 20 x 7.6 cm) slab.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Pargro Slab, 36 x 6 x 3 in (91.4 x 15 x 7.6 cm) w/ Three 4 in Pre-Cut Squares (Bag)
Q112802
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 6 x 3 in (91.4 x 15 x 7.6 cm) slab.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Pargro Slab, 36 x 6 x 4 in (91.4 x 15 x 10 cm) w/ Three 4 in Pre-Cut Squares (Bag)
Q112800
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 6 x 4 in (91.4 x 15 x 10 cm) slab.
- Features three 4 inch (10 cm) pre-cut squares.
Grodan Pargro PAR32 Biggie, 6 x 6 x 6 in (15 x 15 x 15 cm) w/ Hole, Loose Blocks on Pallet
Q112797
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 6 x 6 x 6 in (15 x 15 x 15 cm) block.
Grodan Pargro PAR32 Biggie, 6 x 6 x 6 in (15 x 15 x 15 cm) w/ Hole, Loose Blocks in Carton
Q112796
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 6 x 6 x 6 in (15 x 15 x 15 cm) block.
Grodan Pargro PAR22.5 Jumbo, 6 x 6 x 4 in (15 x 15 x 10 cm) w/ Hole, Loose Blocks on Pallet
Q112795
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 6 x 6 x 4 in (15 x 15 x 10 cm) block.
Grodan Pargro PAR22.5 Jumbo, 6 x 6 x 4 in (15 x 15 x 10 cm) w/ Hole, Loose Blocks in Carton
Q112794
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 6 x 6 x 4 in (15 x 15 x 10 cm) block.
Grodan Pargro PAR10 Large, 4 x 4 x 4 in (10 x 10 x 10 cm) w/ Hole, Unwrapped Strips in Carton
Q112793
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 4 x 4 x 4 in (10 x 10 x 10 cm) block.
Grodan Pargro PAR10 Large, 4 x 4 x 4 in (10 x 10 x 10 cm) w/ Hole, Loose Blocks on Pallet
Q112792
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 4 x 4 x 4 in (10 x 10 x 10 cm) block.
Grodan Pargro PAR6.5 Small, 4 x 4 x 2.6 (10 x 10 x 6.6 cm) w/ Hole, Unwrapped Strips in Carton
Q112791
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 4 x 4 x 2.6 (10 x 10 x 6.6 cm) block.
Grodan Gro-Block Improved GR7.5 Medium, 4 x 4 x 3 in (10 x 10 x 7.5 cm) w/ Hole, Unwrapped in Carton
Q112790
- 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.
- Unwrapped strips in carton.
Grodan Pargro Slab, 36 x 8 x 3 in (91.4 x 20 x 7.6 cm) (Bag)
Q112803
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 8 x 3 in (91.4 x 20 x 7.6 cm) slab.
Grodan Pargro Slab, 36 x 6 x 3 in (91.4 x 15 x 7.6 cm) (Bag)
Q112801
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 6 x 3 in (91.4 x 15 x 7.6 cm) slab.
Grodan Pargro Slab, 36 x 6 x 4 in (91.4 x 15 x 10 cm) (Bag)
Q112799
- Pargro® offers Grodan®'s industry-leading stone wool growing media.
- Ideal for indoor growers using low to medium levels of technology.
- Designed for those transitioning from soil, coco, or peat.
- Increases crop cycles per year, saving time and money.
- A perfect solution for transforming your growing experience.
- 36 x 6 x 4 in (91.4 x 15 x 10 cm) slab.