Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen for rapid plant growth. Grodan comes in graduated sizes. Seedlings started in cubes are easily transferred to blocks and then onto slabs, if desired. Seedlings or cuttings started in the Grodan cubes can also be transplanted into more traditional planters and growing mediums.
Grodan Slabs - The final stage of planting with growing blocks are the Grodan slabs. These slabs come in clearly marked UV resistant poly sleeves for ease of use. Recommended for larger, long term crops with extensive roots like peppers, tomatoes, or cucumbers. Typically, seedlings in blocks are placed onto slabs. Grodan Expert is the slab that drains the fastest because of its vertical fibers. By far the most popular slab for the hydroponic hobbyist market. Grodan Master is a special wet/dry slab. The top layer is thicker, which stays wetter, while the bottom layer stays drier. In effect it defies gravity, allowing more even distribution of moisture throughout the slab.
Grodan Expert Slab 15/75 is a top-of-the-line propagation tool that provides growers with optimum results. The unique design of the slab provides exceptional root development that leads to healthy plant growth and high yields. This slab measures 36 inches by 6 inches by 3 inches, making it suitable for both large and small growing operations.
Made from a mixture of high-quality stone wool and organic binders, the Grodan Expert Slab 15/75 is designed to provide optimal air-to-water ratio for plants, leading to increased nutrient uptake and healthy growth. The slab's uniform structure ensures that each plant receives an equal amount of water and nutrients, leading to consistent growth rates and yields.
The Grodan Expert Slab 15/75 is easy to use and is perfect for starting seedlings or rooting cuttings. The slab's high-water holding capacity makes it an excellent choice for growers who need to water their plants less frequently.
In summary, the Grodan Expert Slab 15/75 is a valuable propagation tool that provides growers with optimal plant growth and yields. With its unique design and superior features, it is no wonder why this slab is a popular choice among growers worldwide.
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