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Grodan Rockwool

What is Grodan® Stonewool?

Made from natural melted rocks blown into mineral fibers, Grodan stonewool (generically known as rockwool) has become the preferred choice of soil-less growing worldwide. Using their exlusive Delta® Technology for improved fiber structure and layering, they create perfectly uniform products that are both chemically and biologically inert. This provides a clean medium for growing high quality vegetables, fruits and vibrant flowers.

What Grodan Offers You:

EXPERIENCE
They were the first to develop stonewool for growing plants in 1969. And they have been perfecting it ever since.

ENVIRONMENTAL STEWARDSHIP
Much of the new Grodan you buy is made from used stonewool. Our recycling activities and low emissions have earned our factories various prestigious European and international environmental certifications such as the ISO 14001, the EMAS and the Dutch Milieukeur Award.

QUALITY
Grodan stonewool samples are taken off of the production line every 20 seconds for analysis. If there is a problem, the wool is melted and the process starts again. Such dedication has earned their product the international quality rating ISO 9001.

SUPPORT
Whether you are a beginner or experienced Grodan gardener, they are here to help. Their website offers great information, downloads and the opportunity to contact them directly. We challenge you to find a rockwool manufacturer that offers the same level of technical support as Grodan.

For further information and growing guides please see their websites:

www.hydroponics101.com
www.grodan.com

Grodan A-OK Starter Plugs, Mini-blocks & Macroplugs Grodan A-OK Starter Plugs, Mini-blocks & Macroplugs
A-Ok Starter Plugs are designed for starting seeds and rooting of cuttings (clones) prior to plugging into the larger Gro-Blocks. 1.5” size fits the holes in the blocks. They work perfectly in the white Grodan Starter Tray (found on back page). A-Ok plugs come in a sheet that fits a standard 10x20 tray (flat). The sheets come shrink-wrapped and labeled with instructions.   More Details and Pricing
Grodan Big Mama Blocks Grodan Big Mama Blocks
BIG MAMA is the largest block ever produced by Grodan. It is 8" square and contains over twice the amount of wool as the popular Hugo block. This block is big enough to grow a large plant for its entire life! When your plant outgrows its current block, just place it on top of Big Mama. BIG MAMA is solid wool and does not have a precut hole thus making it suitable to hold any size smaller block on top (even a Hugo).   More Details and Pricing
Grodan Gro-Blocks Grodan Gro-Blocks
Gro-Blocks are like a ‘container’ to pot-up young seedlings. If you normally would use a 3” pot to transplant your seedling into, then choose a 3” Gro-Block. Small plants can be fully grown in our larger Gro-Blocks. 1.5” A-Ok plugs and Macroplugs fit perfectly into the Gro-Block holes. If transplanting onto a slab, leave white plastic wrapping on, but if going into a loose medium, then remove the plastic. They come in packs labeled with instructions.   More Details and Pricing
Grodan Uni-Slab Grodan Uni-Slab
The UNI-SLAB™ combines all the benefits of our traditional slabs with the versatility of a block. With a size of 9.5”L x 8”W x 4”H the UNI-SLAB™ is has great stability for any size plant The UNI-SLAB™ is completely wrapped keeping all the roots of your plant safely contained within the slab, protected from light and outside contaminants. Yet it’s small enough to be maneuverable, allowing your plants to be spaced as the plant canopy requires. Due to the height of 4” the UNI-SLAB™ is suitable for both top drip and flood systems.   More Details and Pricing
Grodan Gro-Slabs Grodan Gro-Slabs
Gro-Slabs are the final stage for growing a spectacularly large plant in stonewool. Using the Delta Technology, we have created incredibly uniform slabs with greater firmness. 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 prevention.   More Details and Pricing
Grodan Granulate Grodan Granulate
Granulated rockwool works great on its own or mixed with other loose media such as expanded clay rocks. If planting in containers outdoors, Water Absorbant Granulate is the best medium of choice. Our granulate comes in large 45, 40 or 20 lb. pound bags.   More Details and Pricing
Grodan Growcubes Grodan Growcubes
Growcubes are small 1/2” cubes of stonewool. There are several advantages to using this loose medium: better aeration due to how the cubes stack on top of each other, maximum drainage from each cube so that you can hardly ever overwater your plant, easily mixes with other loose media (such as expanded clay rocks or CocoCan™ Gro-Mix), lightweight and much cleaner than peat-based media, but with better growth rate. The properties of Growcubes make it like a 50/50 mix of absorbent to repellent stonewool.   More Details and Pricing
Grodan Reusable Trays Grodan Reusable Trays
This sturdy reusable white tray has been especially engineered for the Grodan® company to perfectly fit the 1.5” AO starter plugs and round Macroplugs.   More Details and Pricing
Grodan Syringe Needles Grodan Syringe Needles
These Grodan Metal Needles are used by professional growers to extract water samples deep from within a Gro-Block or Gro-Slab. They make a smooth insertion with little damage to the block or slab. Use with any Luer-Lock™ Syringe, such as the one on this page. They are 4.5” (11.4cm) long with two sampling holes at the tip.   More Details and Pricing


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