Value Package Includes: You will get 2 sheets of 1.5-inch rockwool, a total of 98 pieces of rockwool cubes. The rockwool material used in these cubes is top-notch. It's durable, holds moisture well, and provides a great environment for seedlings to grow Natural Material: This rockwool is very effective hydroponics supplies, made of high-quality basalt, centrifuged at high speed to form fibers after being melted at high temperature, and compressed into blocks through proprietary process, soft and even texture, good water absorption and strong air permeability, which is helpful to the growth of roots How to Use: Please cut the rockwool into cubes according to your needs with a knife before soaking. Then simply soak the cubes briefly (10 sec) in a nutrient solution to adjust its EC and pH value to the range required by your seeds. The optimum pH for most plant seeds is about 5.5. Then control the suitable moisture, illumination and temperature to improve germination rate of seeds. When the robust roots penetrate through the rockwool about 0.5-1 inch, transplant it into a suitable container Easy to Transplant: Rockwool grow cubes keep the seeds long enough to establish a root system because of their high water absorption, you can cut it into different sizes, cubes, it will not sepreate after immersion, easily transplant to net pots, soil, planting machine after rootted Application: These rockwool starter plugs have good moisturizing effect and handy planting hole, widely used in hydroponic, seed starting, rooting, plant propagation, cloning systems and so on. Much convenient than starting in the soil, these are great for planting enthusiasts and commercial growers You can use it for various cultivation experiments, like tomatos, peppers, vanilla, it can faster root, healthier growth and save your time!

Specification:
1)Material: Basalt.
2)Size: 11.4 × 11.4 × 3.3 inch.
3)Package includes: 4 sheets, 98pcs 1.5-inch rockwool cubes in total.
4)Wide application: Used for soilless cultivation, nutrient liquid culture, organic cultivation, hydroponics growing system, hydroponic garden, perfect for planting beginners, also can send it to friends as gift.
Note: Manual measurement, please allow slight errors on size.The colors may exist a slight difference due to different screens.