Pack of 50(Best value for money)Dimension per cube: 1.25″ x 1.25″ x 2″Description:Rockwool is a popular soilless growing medium for gardening and hydroponics because it holds water well and allows air to circulate the root zone for exceptional plant growth. Its strength makes it suitable for root support. In the hydroponics industry, rockwool competes with other types of grow mediums like grow stones, clay pebbles, coco coir, Oasis cubes, floral foam, vermiculite, perlite, and gravel.Rockwool is lightweight, and can be reused. It provides a sterile growing environment for plants, and although it starts out with a naturally high pH, with proper conditioning its pH can be stabilized to make it suitable for plant growth.Tips:
First, take a clean bucket and fill it about two-thirds with luke-warm water the purer, the better but tap water will usually work fine if that’s all you have.
Submerge the rockwool cubes and leave to soak for between fifteen minutes and two hours.
Carefully place one seed in the hole in each cube. Don’t place them too deep. Just a fraction below the surface is fine.