One of the drawbacks to using rockwool cubes is the special care and consideration that needs to be taken when working with them. The smallest ones work well for starting seeds and propagating stem and leaf cuttings the larger cubes are used by growers to grow more compact plants. Rockwool cubes come in a couple of different sizes. The cubes can also be quickly rinsed with fresh water, leaching fertilizer salts out. A non-existent cation exchange capacity (CEC) prevents nutrients from being changed by the growing medium or tied up and made unavailable for plant uptake. Their inert nature also means growers can quickly adjust the conditions within the root zone to meet the needs of plants. Being considered a natural product makes them acceptable in organic growing systems, increasing their popularity. This is because they originate from basaltic rock and chalk which are natural ingredients. The increased water holding capacity and oxygenation within the root zone is exceptionally beneficial when starting seeds and rooting propagation cuttings.Īnother benefit to rockwool cubes is they are considered to be a natural product even though they are man made. When the fibers are spun it creates a structure that is perfectly suited to retain water while holding more oxygen than typical soil mediums. Rockwool cubes are popular with hydroponics growers, as well as conventional growers because of their beneficial structure. The mats are then cut into various sizes of cubes and slabs to be sold to customers as a growing medium for plants. This creates an ideal growing medium for hydroponic growing systems.Īfter the fibers are spun, they are mixed with a binding agent and pressed into large mats. Then people throw the lava into a spinning chamber to create the fibers in a process much like making cotton candy.ĭue to the firing process, rockwool cubes are chemically and biologically inert. Basalt rock and chalk are combined and then melted at a very high temperature (approximately 3000☏) to form lava. Similar in texture to steel wool, rockwool is a dense mat consisting of long strands of natural fibers. Cheap and reliable starter cubes for seed starting and germination What are Rockwool Cubes? Great moisture retention without drowning the seeds. These benefits contribute to its popularity amongst growers, accommodating almost any plant they are growing.Ī OK Rockwool Stonewool Hydroponic Grow Media Starter Cubes Plugs + THCity Gloves It retains moisture well, it retains oxygen well, it never impedes root growth, it is chemically inert, and it comes in a variety of sizes and shapes. Originally used as insulation and also known as mineral wool or stone wool, rockwool was developed in Denmark back in the 1970’s for gardening. Rockwool is a mainstay growing media for commercial hydroponics growers, primarily those who implement drip irrigation systems.
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How to use Rockwool Cubes for Growing, Seed Starting, and Cutting Propagation You can find out more by following this link. You can find out more by following this link.īy staying on this site, you agree to the use of cookies. section.īy staying on this site, you agree to the use of cookies. For more information in regards to our website, please head over to the F.A.Q.
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of seeds as it is ILLEGAL to germinate seeds and sell them for germination purposes in the United Kingdom and we cannot be seen promoting this. We CANNOT, and WILL NOT discuss germination / yields / THC levels, etc. We at ‘The Attitude’ are here to help, but we do have our restrictions. We sell our seeds for souvenir purposes only and for storage in-case the laws change.