Peat moss is better then Rockwool. You must soak the Rockwool in Ph ajusted water set at 5.2 for 24 hours before you use them the first time.

Good luck
Zandor Reviewed by Zandor on . Uurgently need instant help please! I need to know if I can start seedlings in perlite or if I need to use rockwoll. If I can use perlit how do I do it? I am gonna do the full grow using this settup http://www.weedfarmer.com/cannabis/hydrosystems_guide.php Its really urjent because I have allready germinated the seeds in paper touls so need to plant them really soon. Rating: 5