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  Grow Lights & Hydroponics from Interior Gardens Grow Light Supply :: Growing Media :: Stonewool / Rockwool

Grodan Stonewool - Constant controlled quality - Clean: contains no contaminants - Optimum control range - High yield at high quality - Saves on water and nutrients - Lower energy consumption - Easy to use - 100% recyclable -Sustainable and environmentally-friendly

Stonewool / Rockwool
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A'Ok Starter Plugs - 1.5 in. sq. Sheet of 98 starter cubes - Grodan Stonewool
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A'Ok Starter Plugs - 1.5 in. sq. Sheet of 98 starter cubes - Grodan Stonewool

Made in Denmark since 1969, horticultural stonewool is widely recognized as an ideal growing substrate. Each Grodan A'Ok Starter Plug has a pre-formed hole to insure easy seed or cutting placement. Gardeners simply wait for plant roots to penetrate the bottom of each A'Ok Starter Plug before tran...

Price: $11.75
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BIG MAMA 8 in. X 8 in. X 8 in. - Grodan
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BIG MAMA 8 in. X 8 in. X 8 in. - Grodan

The largest block ever produced by Grodan, the Big Mama™ measures 8 in. x 8 in. x 8 in. and contains well over twice as much wool as the popular Hugo block. This block is big enough to grow a large plant for its entire life. When a plant outgrows its current block, gardeners ...

Price: $7.75
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Block Covers 4.5 in. Covers (40ea) Sunleaves
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Block Covers 4.5 in. Covers (40ea) Sunleaves

Dual-purpose Sunleaves Block Covers reflect light back towards plants in addition to protecting them from algae growth. Black on one side, white on the other, these block covers will work with any media, although they are designed for four-inch stonewool cubes. There are 40qty 4-1/2in covers in e...

Price: $5.95
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BLOCK CVRS 4 in. Qty. 40
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BLOCK CVRS 4 in. Qty. 40

Dual-purpose Sunleaves Block Covers reflect light back towards plants in addition to protecting them from algae growth. Black on one side, white on the other, these block covers will work with any media however they are designed for four-inch stonewool cubes. Qty. 40.

Price: $7.50
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BLOCK CVRS 6 in. Qty. 40
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BLOCK CVRS 6 in. Qty. 40

For Rock Wool & Other Grow Media

Blocks light from media reducing algae & pest problems

Use white side up to reflect light

Use toothpick to hold cover in place


Price: $13.95
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Cocodan Coco Caps 4 in. 10 EA
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Cocodan Coco Caps 4 in. 10 EA

The organic alternative to plastic covers for rockwool blocks. Use Coco Caps to help prevent light penetration that may cause algae growth.

Price: $3.95
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Delta Slab  36 in. x 6 in. x 3 in. (Rockwool / Stonewool) Grodan
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Delta Slab 36 in. x 6 in. x 3 in. (Rockwool / Stonewool) Grodan

Stonewool is recognized the world over as a dependable hydroponics growing medium and Grodan stonewool in particular is known for its quality, consistency and performance.

Price: $7.25
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Delta Slab 36 in. x 8 in. x 3 in. (Rockwool / Stonewool) Grodan
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Delta Slab 36 in. x 8 in. x 3 in. (Rockwool / Stonewool) Grodan

Grodan Stonewool is a proven hydroponics growing medium preferred by garden enthusiasts everywhere. This 36 in. x 8 in. x 3 in. Delta Slab is perfect for "blocking on" smaller stonewool plugs and blocks to accommodate the final stages of plant growth. This single Delta Slab fe...

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Delta Slab 6 in. X 4 in. X 36 in. SLAB (Rockwool / Stonewool) Grodan
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Delta Slab 6 in. X 4 in. X 36 in. SLAB (Rockwool / Stonewool) Grodan

Grodan Stonewool is a proven hydroponics growing medium preferred by garden enthusiasts everywhere. This 36 in. x 6 in. x 4 in. Delta Slab is perfect for "blocking on" smaller stonewool cubes and blocks to accommodate the final stages of plant growth. Slabs feature vertic...

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Granulate - 45 lb. Water Absorbent ( Rockwool / Stonewool ) Grodan
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Granulate - 45 lb. Water Absorbent ( Rockwool / Stonewool ) Grodan

Grodan Water Absorbent Granules consist of premium horticultural stonewool with a reputation for quality and performance. Particularly practical in hanging baskets, gardeners can use Water Absorbent Granules as a stand alone medium or as an amendment to their favorite potting mix to improve the o...

Price: $64.95
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Gro-Blocks - 2 in. x 2 in. x 2 in. 24 wrapped mini blocks - MM50/40 Grodan
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Gro-Blocks - 2 in. x 2 in. x 2 in. 24 wrapped mini blocks - MM50/40 Grodan

Stonewool is a state-of-the-art growing substrate preferred by hundreds of hydroponics gardeners. Seeds or cuttings are started in these Grodan Mini-Blocks and, once rooted, the blocks are transferred to a larger piece of stonewool. Mini-Blocks can be planted directly into containers for soil gar...

Price: $5.95
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Gro-Blocks - 3 in.x 3 in. x 2.5 in.  8 Wrapped Blocks - DM4 (Rockwool / Stonewool) Grodan
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Gro-Blocks - 3 in.x 3 in. x 2.5 in. 8 Wrapped Blocks - DM4 (Rockwool / Stonewool) Grodan

This is a strip of eight 3 in. x 3 in. x 2.5 in. Gro-Blocks, each with pre-formed holes.

Price: $4.95
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Gro-Blocks - 4 in. x 4 in. x 2.5 in. DM6 (Rockwool / Stonewool) Grodan
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Gro-Blocks - 4 in. x 4 in. x 2.5 in. DM6 (Rockwool / Stonewool) Grodan

This is a strip of six 4 in. x 4 in. x 2.5 in. Gro-Blocks, each with pre-formed holes.

Price: $5.50
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Gro-Blocks - 4 in. x 4 in. x 3 in. DM8 (Rockwool / Stonewool) Grodan
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Gro-Blocks - 4 in. x 4 in. x 3 in. DM8 (Rockwool / Stonewool) Grodan

This is a strip of six 4 in. x 4 in. x 3 in. Gro-Blocks, each with pre-formed holes.


Price: $7.25
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Gro-Blocks - 4 in. x 4 in. x 4 in. (Rockwool / Stonewool) Grodan
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Gro-Blocks - 4 in. x 4 in. x 4 in. (Rockwool / Stonewool) Grodan

This is a strip of six 4 in. x 4 in. x 4 in. Gro-Blocks, each with pre-formed holes.

Price: $8.25
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Gro-Blocks - Hugo - 6 in. x 6 in. x 6 in. (Rockwool / Stonewool) Grodan
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Gro-Blocks - Hugo - 6 in. x 6 in. x 6 in. (Rockwool / Stonewool) Grodan

This is a single 6 in. x 6 in. x 6 in. Gro-Block with a pre-formed hole. Grodan stonewool is known for its quality, consistency and performance.

Price: $3.35
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Gro-Blocks 4 in. x 4 in. x 3 in. DU8 (Stonewool / Rockwool) Grodan
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Gro-Blocks 4 in. x 4 in. x 3 in. DU8 (Stonewool / Rockwool) Grodan

Known for its quality, consistency and ease of use, high-performance Grodan stonewool is used by hydroponics gardeners the world over. Seeds or cuttings are started in these Grodan Gro-Blocks and, once rooted, the blocks are transferred to a larger stonewool slab. Gro-Blocks can also be planted d...

Price: $7.25
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GRODAN MACRO PLUG 1.5IN. 50 BAG
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GRODAN MACRO PLUG 1.5IN. 50 BAG

Stonewool Macro Plugs are a sure bet for optimum germination. They start as basalt rock and chalk that is melted, spun into cotton candy-like fibers, and finally compressed into plugs. Their fibrous structure creates an ideal air-to-water ratio which contributes to robust root development thro...


Price: $10.60
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Grodan Stonewool Block 3 in. x 3 in. x 2.5 in. (8ea) - No Hole
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Grodan Stonewool Block 3 in. x 3 in. x 2.5 in. (8ea) - No Hole

Stonewool is recognized the world over as the ideal hydroponics growing substrate. Seeds or cuttings are started in these Grodan Gro-Blocks and, once rooted, the blocks are transferred to a larger stonewool slab. Gro-Blocks can be planted directly into containers for soil gardening as well. This ...

Price: $4.75
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Grodan Stonewool Gro-Blocks  (8ea) 3 in. x 3 in. x 4 in.
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Grodan Stonewool Gro-Blocks (8ea) 3 in. x 3 in. x 4 in.

Stonewool is recognized the world over as an ideal hydroponics growing medium. Seeds or cuttings are started in these larger Grodan Gro-Blocks and, once rooted, the blocks are transferred to a larger stonewool slab. Gro-Blocks can be planted directly into containers for soil gardening as well. Th...

Price: $7.95
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Growcubes 23 gal Bag. Grodan Stonewool
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Growcubes 23 gal Bag. Grodan Stonewool

"Easy to use and environmentally friendly, Grodan growcubes provide plant roots with a stable foundation and an excellent balance of air and water."

Made in Denmark since 1969, stonewool is widely recognized as the ideal growing substrate. For any growing application, stone...

Price: $38.95
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Growcubes 3 gal. Bag Grodan Stonewool
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Growcubes 3 gal. Bag Grodan Stonewool

"Easy to use and environmentally friendly, Grodan growcubes provide plant roots with a stable foundation and an excellent balance of air and water."

Made in Denmark since 1969, stonewool is widely recognized as the ideal growing substrate. For any growing application, stone...

Price: $6.95
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Mini-Blocks - 1.5 in. sq.- (45) wrapped mini blocks (Rockwool / Stonewool) Grodan
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Mini-Blocks - 1.5 in. sq.- (45) wrapped mini blocks (Rockwool / Stonewool) Grodan

Three strips of 15 wrapped Mini-Blocks - 45 total blocks each measuring 1.5 in. square.


Price: $8.50
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RW COCO CAP 6 in. 10 EA
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RW COCO CAP 6 in. 10 EA

The organic alternative to plastic covers for rockwool blocks. Use Coco Caps to help prevent light penetration that may cause algae growth.

Price: $4.95
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UNI-SLAB 9.5 in. X 8 in. X 4 in. - Grodan
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UNI-SLAB 9.5 in. X 8 in. X 4 in. - Grodan

All plant roots are protected and contained for the life of the plant. Due to its size, the Uni-Slab is perfect for one large plant. Uni-Slab has the benefits of a slab with the versatility of a block

Price: $5.35
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Bestsellers
A'Ok Starter Plugs - 1.5 in. sq. Sheet of 98 starter cubes - Grodan Stonewool
Price: $11.75
Gro-Blocks - 3 in.x 3 in. x 2.5 in. 8 Wrapped Blocks - DM4 (Rockwool / Stonewool) Grodan
Price: $4.95
Gro-Blocks - 4 in. x 4 in. x 4 in. (Rockwool / Stonewool) Grodan
Price: $8.25
 


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