flowering in rock wool?

Anyone ever done it?

Is it a totally stupid question?

Are rock wool blocks OK to flower in on a flood/drain tray?

not sure about flood and drain.

but ok for drippers, NFT and hand water.

just make sure pH is around 5.8 as it tends to drift up using rockwool.


J

Check out my avatar and my signature . I use 6"x6" Rockwool Blocks . I use a 2'x4' flood and drain table .

Flood and drain systems were originally designed to use lava rock and/or clay gravel as a growing medium. The rockwool in this application is mainly for supporting the plant through cloning and planting. The rockwool is cut in small cubes,2"x2". A nail or toothpick is shoved in the top to know what side is up and you need to start the hole in the rockwool anyway so you can get the clone in it without breaking it. After the roots are established the system is flooded and the clones are placed into their position. For most flood and drain application that uses these growing mediums the watering cycle is 15 minutes start to finish every 8 hours. The bed must be flooded to the top of the gravel and completely drained at ending. One of the key benefits to this system is that the root system gets positive air exchange every eight hours. {NU:I/6 THAT OF DIRT PER GALLON} Five day total water exchange, top up daily. You need a bubbler for your resevoir.

Thanks all. Here's 2 pics I took this morning of my set-up. I've been hand watering. Getting ready to put the small rock wool cubes into the bigger cubes and get my flood cycle set up using my reservoir, pump, and a timer. All thoughts welcome. I've never done this before....