For blocks of rockwool and other grow media. Grower's Edge Block Covers block light from media which helps reduce algae. Use white side up to reflect light. Use toothpick to hold cover in place. Hole in center of cover measures 1/2 inch in diameter.
Gro Block Improved GR5.6 Large 3" w/Hole 3" x 3" x 4" Shrink wrapped/Strip
Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro-Blocks Improved with Grodan’s Advanced Wetting Agent.
These leading-edge blocks have the optimal fiber structure and physical properties for crop uniformity, more even Water Content (WC) and Electrical Conductivity (EC) distribution throughout the entire block, and the greatest steering capabilities available. Water distribution is more uniform throughout the entire block which is the basis for a well-defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops.
New and improved wetting agent and hydrophilic technology greatly enhances the water characteristics of Grodan Gro-Blocks Improved giving even better water distribution over the height of the block. This results in greater plant development and steerability and more efficient use of water and nutrients.
Optimized wool structure allows for faster rooting-in and nutrient solution replenishment, all while the Gro-Block Improved maintains its structure, firmness, and rigidity throughout the growing process.
The original Hydroton brand expanded clay is a unique, lightweight expanded clay aggregate made in Germany. This natural clay is mined, formed into pellets, then kiln fired at high temperatures to cause the clay to expand into tough, lightweight balls. Clay naturally has balanced capillary action, with an ideal surface structure. Hydroton brand expanded clay is semi-porous and generally does not float like other products can. For best results, rinse all expanded clay before use. It is reusable as long as it is thoroughly cleaned between uses. 50 liter bags feature an easy-pour spout. Size specification is 8-16 mm.
Grodan Improved
Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro-Blocks Improved with our Advanced Wetting Agent.
These leading-edge blocks have the optimal fibre structure and physical properties for crop uniformity, more even Water Content (WC) and Electrical Conductivity (EC) distribution throughout the entire block, and the greatest steering capabilities available. Water distribution is more uniform throughout the entire block which is the basis for a well-defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops.
These rockwool plant starting plugs feature a slit for easy insertion of rooted cuttings. Ideal for growers using aeroponic EZ-Clone machines. They fit perfectly into the holes of any standard rockwool blocks, inserted into pebbles, or any other type of growing media.
GEOLITE clay pebbles serve as a strong, durable and versatile media, perfect for hydroponics and many horticultural applications. Made from 100% natural Italian clay, this media is industrially produced at extremely high temperatures (2200F/1200C) and specially treated for a consistent EC and stable, neutral pH. It offers great aeration and drainage, ensuring success with technically one of the best growing medias for your indoor garden. Thanks to GEOLITE clay pebbles' unique structure and ability to cover a large surface area, they offer the ideal environment to foster beneficial bacterial growth around the root zone. Ideal for drip feed, deep water culture, and flood and drain systems. 10L bag.Features:Stable and low-ECHigh total porosity (approximately 85% by volume) provides excellent root ventilation and oxygenation to plantsExcellent draining capacityStrong, stable and durableGreat for soil aeration and drainagePerfect for hydroponics, hydroculture, and aquaponics8-20 mm size
Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro-Blocks Improved with Grodan’s Advanced Wetting Agent.
These leading-edge blocks have the optimal fiber structure and physical properties for crop uniformity, more even Water Content (WC) and Electrical Conductivity (EC) distribution throughout the entire block, and the greatest steering capabilities available. Water distribution is more uniform throughout the entire block which is the basis for a well-defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops.
New and improved wetting agent and hydrophilic technology greatly enhances the water characteristics of Grodan Gro-Blocks Improved giving even better water distribution over the height of the block. This results in greater plant development and steerability and more efficient use of water and nutrients.
Optimized wool structure allows for faster rooting-in and nutrient solution replenishment, all while the Gro-Block Improved maintains its structure, firmness, and rigidity throughout the growing process.
Grodan Improved Gro-Slab and Uni-Slab
Grodan Improved Gro-Slabs and Uni-Slabs offer a wide control range to steer your crop using irrigation strategies. Featuring the Advanced Wetting Agent, Gro-Slabs offer more uniform WC and EC distribution throughout each slab and from slab to slab. Fast rooting and vigorous growth throughout the entire growing cycle improve cannabis plant health, better resilience and higher yields. The improved slab structure and physical properties guarantee rapid resaturation within a wide steering range.
Grodan Improved Gro-Slabs are the ideal solution for growers seeking a reliable substrate that facilitates easy irrigation and leaves nothing to chance throughout the cultivation period.
Application
Grodan Improved Gro-Slabs and Uni-Slabs are extremely versatile and lend themselves perfectly to the cultivation of cannabis. Blooming plants will show fast growth, uniform stem development and early setting.
Product Features
Single plant and multi-plant slab options
Vertical fiber orientation
Inert hydrophilic fibre technology
High resaturation capacity
Uniform water distribution throughout the Grodan Improved Uni-Slabs
SOLD INDIVIDUALLY
Pargro is the leader among affordable horticultural rockwool. Made right in the Grodan factory, so you can be assured of a high quality product at a great price.DrainageDriest value-priced rockwool on the market14% drier than competitor blocksValueValue priced no frills saves you moneyHalf case sizes in plain boxesQualityCheap in price but not in strength and uniformityMade under quality control at Grodan factories
Grodan Improved pre-cut Gro-Slabs are an efficient and ideal solution for growers seeking a reliable substrate that facilitates easy irrigation and leaves nothing to chance throughout the cultivation period.
Grodan Improved pre-cut Gro-Slabs are extremely versatile and lend themselves perfectly to cultivation. Blooming plants will show fast growth, uniform stem development and early setting.
Grodan Improved pre-cut Gro-Slabs offer a wide control range to steer your crop using irrigation strategies. Featuring the Advanced Wetting Agent, these Gro-Slabs offer more uniform WC and EC distribution throughout each slab and from slab to slab. Fast rooting and vigorous growth throughout the entire growing cycle improve plant health, better resilience, and higher yields. The improved slab structure and physical properties guarantee rapid re-saturation within a wide steering range.
Product Features
Multi-plant and slab hole size options
Vertical fiber orientation
Inert hydrophilic fibre technology
High re-saturation capacity
Uniform water distribution throughout the pre-cut Grodan Improved Uni-Slabs
Key Benefits
Retains sufficient water
The Advanced Wetting Agent in all Grodan Improved Gro-Slab’s results in more uniform water distribution throughout the entire slab. As the slab retains sufficient moisture at all times the risk of plants drying out is minimized. The improved capillary action of Gro-Slabs also ensures that moisture is retained more evenly throughout the entire slab.
Easy irrigation
The properties of all Grodan Improved Gro-Slabs enable a multi-faceted irrigation strategy by allowing growers to vary the water volume within a safe range of between 55% and 78% (day level). If insufficient water has been supplied, the slab can be re-saturated quickly at any desired moment. And if too much water has been given, the slab’s properties will ensure that excess water is drained away efficiently to prevent the WC from rising too high.
Fast, uniform crop development
The vertical, fibrous structure of all Grodan Improved Gro-Slabs enables roots to penetrate the slab easily, resulting in fast root development. Homogenous development in the root zone guarantees vigorous and uniform crop growth resulting in stronger, healthier plants. In addition, the firmness of the slab structure guarantees a stable root volume right up until the end of the cultivation cycle.
Excellent Steerability
The ability of Grodan Improved products to distribute WC and EC evenly throughout the slab volume creates optimal steering capabilities. Growers have more control of the plant’s balance throughout the crop cycle, allowing plant steering with precise adjustments of the WC and EC in the rootzone.
Sustainable water and nutrient use
Stone wool fibres do not bind nutrients and do not require flushing at the start of the cultivation cycle. An initial targeted application of water and nutrients in the cultivation cycle enables sustainable water and fertilizer use. In combination with other management strategies, including GroSens and e-Gro tools that enable precision growing, Grodan Improved GroSlabs facilitate optimum crop steering for healthy plants and greater yields
PLASTIC BLOCK COVERS Reflect light to plant leaves, where it’s needed most. Block light from media. Eliminate algae and mildew growth. 40 dual sided block covers per pack. Works great with GRODAN Blocks.
Block light from media
Reflect light to plant leaves where it's needed most
Eliminate algae and mildew growth
40 dual-sided block covers per pack
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 prevention. With the Uni-Slab, 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. All Gro-Slabs have vertical fibers except the 12 in Gro-Slab, which has horizontal fibers.
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 or coconut fiber or leave wrapping on and set on top of a larger Gro-Block. Packed in easy tear-away strips, labeled with instructions.
The original Hydroton brand expanded clay is a unique, lightweight expanded clay aggregate made in Germany. This natural clay is mined, formed into pellets, then kiln fired at high temperatures to cause the clay to expand into tough, lightweight balls. Clay naturally has balanced capillary action, with an ideal surface structure. Hydroton brand expanded clay is semi-porous and generally does not float like other products can. For best results, rinse all expanded clay before use. It is reusable as long as it is thoroughly cleaned between uses.
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 entire substrate volume Full saturation of the blocks with no dry spots and improved EC control with less water is achieved in the rootzone due to the uniform, optimized wool resulting in a sustainable water and nutrient use. Improved “re-wettability” able to more easily increase water concentration in the substrate.
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 entire substrate volume Full saturation of the blocks with no dry spots and improved EC control with less water is achieved in the rootzone due to the uniform, optimized wool resulting in a sustainable water and nutrient use. Improved “re-wettability” able to more easily increase water concentration in the substrate.
GROW!T horticultural clay pebbles are made from 100% natural clay. They are clean, pH stable, and offer great aeration and drainage in hydroponics, especially in flood and drain, deep water culture, and drip feed systems. Due to their unique structure and ability to cover a large surface area, they offer the ideal environment to foster beneficial bacterial growth around the root zone, leading to naturally healthier plants.GROW!T Clay Pebbles benefits:Extremely stable in both pH and ECMade from 100% natural clayStrong structural integrity means that they are less likely to break and compact, which helps to prevent dripper systems from getting blockedPre-washed to aid in stabilityDrains freely and does not hold any excess water, providing good oxygen levels around the root; suitable for flood and drain systems, multi-pot and drip feed systemsPebble size 4mm - 16mmGROW!T Clay Pebbles can be used for:Aeration of growing media - ideal to mix into coco coir or soil to aid aerationDrainage - will hold water as well as offering great aeration properties and free drainingDecoration - looks great as a top dressing for pots and also helps to prevent evaporationHydroponics/hydroculture - used widely in hydroponic growing, they are ideal for flood and drain, deep water culture and drip feed systemsAquaponics - are also ideal to be used in aquaponic systemsWhen used in aeration of growing media, mix GROW!T horticultural clay pebbles into your coco coir or soil at a rate 4 parts clay to 7 parts soil to loosen up the structure, leading to better root development.
Granulated rockwool can be used alone or as an amendment to organic based mixes. For example, the addition of water absorbant granulate to peat mixes at 25-50% volume increases water holding capacity and aeration, improving plant growth and shelf life. The water repellent granulates are superior substitutes for aerators such as perlite or Styrofoam. The granulate is prilled for easy mixing.Granulated rockwool as potting mix: When you use granulated rockwool to pot up your plants, the great advantage is that you never have to change the mix. The rockwool will last for the life of your plant. Rockwool's high water holding capacity will enable you to go on vacation without worrying about your plants drying out.
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 entire substrate volume Full saturation of the blocks with no dry spots and improved EC control with less water is achieved in the rootzone due to the uniform, optimized wool resulting in a sustainable water and nutrient use. Improved “re-wettability” able to more easily increase water concentration in the substrate.
Pargro stonewool blocks are available in a number of sizes to suit all types of plants. Measuring 6 in x 6 in x 4 in, the Jumbo is a particularly good choice of block size for an ebb and flow system because it is 2 in shorter than the Biggie. All blocks with holes fit 1.5 starter plugs.Pargro is Grodan's generic value product line, saving you money while providing you the same quality clean, hygienic, and uniform Grodan product. The Pargro product line averages 14% drier than Cultilene Comfort Blocks making it the driest, value-priced stonewool available.
Pargro stonewool blocks are available in a number of sizes to suit all types of plants. Measuring 6 in x 6 in x 4 in, the Jumbo is a particularly good choice of block size for an ebb and flow system because it is 2 in shorter than the Biggie. All blocks with holes fit 1.5 starter plugs.Pargro is Grodan's generic value product line, saving you money while providing you the same quality clean, hygienic, and uniform Grodan product. The Pargro product line averages 14% drier than Cultilene Comfort Blocks making it the driest, value-priced stonewool available.
