3 Review(s)

Rockwool is manufactured to give a close to ideal level of moisture and aeration in the root zone, this helps prevent over watering and root suffocation from a lack of oxygenation. Rockwool was developed in Denmark back in the 1970's for gardening. It retains moisture well, it retains oxygen well, it never impedes root growth. Rockwool is perhaps the most popular medium used by hydroponic growers today. When you look at the numerous benefits, there is little wonder why. It retains moisture well, so there is less chances of underwatering. It retains oxygen well, so there is less chance of overwatering. Rockwool is a preferred method of starting seeds due to its excellent moisture retention and ability to give the roots instant access to water and nutrients. The primary reason for using rockwool, or any substrate, in a hydroponic growing system is to provide a buffering reservoir of nutrient solution in the root zone while maintaining an adequate volume of air (oxygen) in contact with the roots. These cubes should soak between several hours to an entire day to ensure that their pH properly adjusts. After they've soaked, place them in your hydroponic garden without seeds or cuttings and run it to ensure that the pH stabilizes. Remember to always use protective gear when handling rockwool. Rockwool starter cubes are one of the most popular choices for seed starting. They come in a variety of sizes and are well-suited for germinating seeds or propagating cuttings. These cubes are often pre-scored to make it easy to insert seeds or cuttings. Begin by thoroughly soaking the rockwool cubes in pH-balanced, clean water (around 5.5 to 6.5 pH) until they are fully saturated. This usually takes a few minutes. Once the rockwool cubes are saturated, gently squeeze out excess water, leaving them damp but not dripping wet. Create small holes or depressions in the top of the cube. The depth of the hole should be about twice the diameter of the seed you’re planting. Place 2 seeds in each hole to ensure germination, then gently cover the seed with the surrounding rockwool. Make sure the seed is in contact with the moist rockwool. Place the seeded rockwool cubes in a tray or container, keeping them together for easy handling. If you have a plastic dome or plastic wrap, you can use it to create a mini-greenhouse effect to maintain humidity. This helps seeds germinate faster. lace the tray with the rockwool cubes in a warm, well-lit area For best results, place tray under grow lights or in a greenhouse. Seeds require warmth and light for germination.