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How to Prep Rockwool?
Posted 27 November 2007 - 02:49 PM
Before you use rockwool you must first soak it in water adjusted to a pH of 4.5 to 5.0. You should soak the rockwool for about 24 hours. To soak rockwool cubes use a bucket or other water tight container, just put the cubes in the water and let them float around. To soak the rockwool slabs cut a hole in the bag around the slab and pour in pH adjusted water until the slab is totally saturated, let soak for 24 hours Then cut drainage slits in the bottom.
Posted 28 November 2007 - 02:55 AM
I soak the cubes in a VERY VERY VERY mild solution of rooting hormone and water (like a couple drops per gallon). Works every time, never once paid any attention to PH (except during a heavy rainstorm. Water from the sky flushes down and contaminates the water-table).
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