Quote:
Originally Posted by David
If I get the rockwool sheet, do I cut it into smaller pieces or how?
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yes and you should wear gloves or it could happen that you get skin irritations. I've read some more articles about it: So it's not absolutely sure that it's carcinogen. Some say it is ... some say it's not

I haven't any experience with it so I read further: It doesn't take the water so easy like sphagnum or peat. So you should totally saturate it with water before putting it in your mixture. It has a ph of 7 - 8,5. So it might be also very usefull in a high ratio in the mixture for campanulata, northiana ...