Grodan Rockwool

Grodan Grow-Cubes Bulk Loose Box
Grodan Grow-Cubes Bulk Loose Box
Brand: Grodan
Grow-Cubes™ are small loose 1/2 in cubes of stonewool. Advantages are better aeration, maximum drainage so that you can hardly ever overwater your plant, easy mixing with other loose media (such as expanded clay rocks or coconut fiber), lightweight and …

Item #: 134182
In Stock
Price: $142.82

 


Grodan PRO Delta 10 - 4 in x 4 in x 4in w/hole large Unwrapped
Grodan PRO Delta 10 - 4 in x 4 in x 4in w/hole large Unwrapped
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 #: 403946
In Stock
Price: $168.85

 


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
You Save: $34.66

 


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 A-OK Starter Plugs 1.5 in Unwrapped
Grodan PRO A-OK Starter Plugs 1.5 in Unwrapped
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 #: 403941
In Stock
List Price: $411.35
Price: $319.74
You Save: $91.61

 


Grodan A-OK 36/40 1.5 in x 1.5 in Plugs
Grodan A-OK 36/40 1.5 in x 1.5 in Plugs
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 #: 111002
In Stock
List Price: $548.39
Price: $413.43
You Save: $134.96

 


Grodan 1.5 in Starter Mini-Blocks MM40/40 1.5 in x 1.5 in x 1.5 in
Grodan 1.5 in Starter Mini-Blocks MM40/40 1.5 in x 1.5 in x 1.5 in
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 #: 111009
In Stock
List Price: $510.10
Price: $385.80
You Save: $124.30

 


Grodan PRO A-OK Starter Plugs 2 in Unwrapped
Grodan PRO A-OK Starter Plugs 2 in Unwrapped
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: $305.15
You Save: $81.58

 


Grodan A-OK 50/40 2 in x 2 in Plugs
Grodan A-OK 50/40 2 in x 2 in Plugs
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 #: 131560
In Stock
List Price: $474.98
Price: $360.29
You Save: $114.69

 


Grodan Gro-Block Improved GR32, 6x6x6, Hugo (box of 64)
Grodan Gro-Block Improved GR32, 6x6x6, Hugo (box of 64)
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 #: 411619
In Stock
List Price: $248.34
Price: $239.32
You Save: $9.02

 


Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole
Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole
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: $252.55
You Save: $54.23

 


Grodan 2 in Starter Mini-Blocks MM50/40 2 in x 2 in x 2 in
Grodan 2 in Starter Mini-Blocks MM50/40 2 in x 2 in x 2 in
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 #: 111011
In Stock
This item has special shipping requirements.
List Price: $461.09
Price: $350.18
You Save: $110.91

 


Grodan PRO Delta 6.5 - 4 in Small Unwrapped
Grodan PRO Delta 6.5 - 4 in Small Unwrapped
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 #: 403945
In Stock
Price: $163.71

 


Grodan Delta 6.5 - 4 in Block 4 in x 4 in x 2.5 in w/ Hole
Grodan Delta 6.5 - 4 in Block 4 in x 4 in x 2.5 in w/ Hole
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 #: 111019
In Stock
List Price: $238.81
Price: $207.84
You Save: $30.97

 


Grodan MacroPlug Round w/ Slit
Grodan MacroPlug Round w/ Slit
Brand: Grodan
MacroPlugs™ are 1.5 in round with a slit that allows easy insertion of a cutting. These loose round plugs fit perfectly into the Gro-Block™ hole. For best results, always insert MacroPlugs™ in a tray with individual cells. The individual cell will …

Item #: 134813
In Stock
List Price: $446.57
Price: $339.56
You Save: $107.01

 


Grodan MacroPlug Round w/ Slit Bulk
Grodan MacroPlug Round w/ Slit Bulk
Brand: Grodan
MacroPlugs™ are 1.5 in round with a slit that allows easy insertion of a cutting. These loose round plugs fit perfectly into the Gro-Block™ hole. For best results, always insert MacroPlugs™ in a tray with individual cells. The individual cell will …

Item #: 131557
In Stock
List Price: $368.58
Price: $282.12
You Save: $86.46

 


Grodan Delta 4 - 3 in Block 3 in x 3 in x 2.5 in No Hole
Grodan Delta 4 - 3 in Block 3 in x 3 in x 2.5 in No Hole
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: $248.97
You Save: $57.81

 


Grodan (PRO) Delta 10, large 4Inches loose on pallet, 4x4x4, w/ holes, no box (1,584)
Grodan (PRO) Delta 10, large 4Inches loose on pallet, 4x4x4, w/ holes, no box (1,584)
Brand: Grodan
Grodan Delta 10 in bulk form on a pallet. Loose, no wrap. Sold in pallets only. 1 pallet = 1548. D10 40/40*1 MID; L PTM WG (TA) T Grodan Hugo in bulk form on a pallet. Loose, no wrap. Sold in pallets only. 1 pallet = 512 Hugos. D32 40/40*1 MID; L PTM WG …

Item #: 411522
In Stock
This item has special shipping requirements.
Price: $1,747.57

 


Grodan A-OK 25/40 - 1 in x 1 in Plugs
Grodan A-OK 25/40 - 1 in x 1 in Plugs
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: $454.78
You Save: $151.40

 


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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