Grodan Rockwool

Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole (24CT)
Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole (24CT)
Brand: Grodan
Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug. Come in packs labeled with instructions. Big …

Item #: 111022
In Stock
List Price: $252.53
Price: $217.87
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Grodan Delta Big Mama Block 8 in x 8 in x 8 in (18CT)
Grodan Delta Big Mama Block 8 in x 8 in x 8 in (18CT)
Brand: Grodan
Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug. Come in packs labeled with instructions. Big …

Item #: 134815
In Stock
Price: $167.64

 


Grodan PRO Starter Mini-Blocks 1.5 in Unwrapped (150/Cs)
Grodan PRO Starter Mini-Blocks 1.5 in Unwrapped (150/Cs)
Brand: Grodan
Mini-Blocks™ sit in a tray (flat) without support for easy starting of seeds and cuttings. These Mini-Blocks™ are individually wrapped in white plastic to minimize algae growth. Remove wrapping and transplant into any loose media such as Grow-Cubes™ …

Item #: 403943
In Stock
List Price: $409.80
Price: $334.47
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Grodan PRO A-OK Starter Plugs 2 in Unwrapped (30/Cs)
Grodan PRO A-OK Starter Plugs 2 in Unwrapped (30/Cs)
Brand: Grodan
A-OK Starter Plugs™ for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks. A-OK Starter Plugs™ come labeled with instructions in a shrink-wrapped sheet that fits a standard 10 x 20 tray (flat). Note: Item #713020 is …

Item #: 403942
In Stock
List Price: $386.73
Price: $316.29
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Grodan Uni-Slab 9.5 in x 8 in x 4 in (16/Cs)
Grodan Uni-Slab 9.5 in x 8 in x 4 in (16/Cs)
Brand: Grodan
Gro-Slabs™ provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block™ plant onto a slab just like professional growers. They come in clearly marked biodegradable UV-resistant sleeves for comfortable handling and algae …

Item #: 134812
In Stock
List Price: $103.11
Price: $99.45
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Grodan Stonewool Grow-Chunks 2 cu ft (3/Cs)
Grodan Stonewool Grow-Chunks 2 cu ft (3/Cs)
Brand: Grodan
Light, airy and versatile. Grow-Chunks™ are about 3/4 in square each and can be used in pots, around blocks or alone. They are easily combined with other media, such as layering with coco fiber or clay pellets. They can also be combined with soil for …

Item #: 134814
In Stock
Price: $150.46

 


Grodan PRO Delta 4 - 3 in Small Unwrapped (48/Cs)
Grodan PRO Delta 4 - 3 in Small Unwrapped (48/Cs)
Brand: Grodan
Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug. Come in packs labeled with instructions. Big …

Item #: 403944
In Stock
List Price: $210.80
Price: $196.45
You Save: $14.35

 


Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/Cs)
Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/Cs)
Brand: Grodan
Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug. Come in packs labeled with instructions. Big …

Item #: 111014
In Stock
List Price: $306.78
Price: $252.78
You Save: $54.00

 


Grodan Delta 4 - 3 in Block 3 in x 3 in x 2.5 in No Hole (48/Cs)
Grodan Delta 4 - 3 in Block 3 in x 3 in x 2.5 in No Hole (48/Cs)
Brand: Grodan
Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug. Come in packs labeled with instructions. Big …

Item #: 111013
In Stock
List Price: $306.78
Price: $252.78
You Save: $54.00

 


Grodan A-OK 25/40 - 1 in x 1 in Plugs (200/Sheet) (30 Sheets/Cs)
Grodan A-OK 25/40 - 1 in x 1 in Plugs (200/Sheet) (30 Sheets/Cs)
Brand: Grodan
A-OK Starter Plugs™ for starting seeds and rooting of cuttings prior to plugging into the larger Gro-Blocks. A-OK Starter Plugs™ come labeled with instructions in a shrink-wrapped sheet that fits a standard 10 x 20 tray (flat). Note: Item #713020 is …

Item #: 131558
In Stock
List Price: $606.18
Price: $486.01
You Save: $120.17

 


Grodan Gro-Block Improved GR32, 6x6x6, Hugo loose on pallet (512)
Grodan Gro-Block Improved GR32, 6x6x6, Hugo loose on pallet (512)
Brand: Grodan
New Grodan Improved! Improved product at current pricing. New density + new hydrophilic technology = better water distribution and root development. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the …

Item #: 411629
In Stock
This item has special shipping requirements.
Price: $1,837.10

 


Grodan also makes Pargro Rockwool, a lower cost alternative with nearly identical quality.

Rockwool is made from molten rock spun into fibers like cotton candy. It's then pressed into different shapes and cut into cubes and slabs. The cubes and slabs feel like a sponge and will not breakdown. The small Multiblocks and Miniblocks can be used for starting cuttings or seeds. After the plants grow out of the small blocks, you can place them in the holes in the larger growing locks. From there you can place them on a slab for larger plants. Although the rockwool can be heat sterilized after use and re bagged, most hobby growers just throw them away after use. The Grodan Growcubes are small squares of rockwool about the size of a sugar cube. They are used for filling pots or mixing with Hydroton for added moisture. The Granulated rockwool is also for filling pots and is less expensive than the Growcubes but does not have the same aeration.

Rockwool Growing Blocks
Growing Blocks are used for small plants in a flood / drain tray
Rockwool Rooting Blocks
Multiblocks are used for seedlings and cuttings
Rockwool Rooting Blocks
Miniblocks for seedlings and cuttings
Granulated Rockwool
Granulated for filling pots
Large Rockwool Growing Block
Hugo Blocks for larger plants, best with a drip system
Rockwool Slab
Slabs for large plants watered by drip irrigation.
Rockwool Small Cubes
Growcubes in a pot

Learn More About Rockwool.

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