Thanks, I will put them on a screen as well to get more airflow below. I have flicked the water out, they were almost dry.
I don't think the blocks are upside down, there is a hole in the top for the new cutting to go into, but no hole on the bottom. I'm using expanded clay so will try transplanting them into that straight away.
Lol I don't think there's a this side up sticker on rockwool it works both ways.
Are you using nutrients ? What ph is the rockwool/solution in the rockwool. Should be 5.5
What im getting at is flat blocks mean roots are squished between block and floor which means no air flow and is prob why he got brown roots blocks i get have a groove in bottom allows air in better rockwool does work both ways but some are made for one way up
Some have no grooves and some have no holes. I think it lacks grooves because they are so small. Can you use Root Riot plugs in DWC setups?
I soaked the rockwool in solution was about 6PH and EC of 5 before I took the cuttings, then I shook most of the water out of the rockwool (with a few wrist flick) before I inserted the cuttings. After that didn't water at all until they felt a bit dry at day 7 and no roots showing yet. Then resoaked in PH6 and flicked most water out again. Roots started showing on first cutting at day 10, day 12 is the photo.
Ok, I have transplanted into final recirculating system with expanded clay already. But was worried this was first sign of some root rot before even begun because I've been struggling with root problems in early clones for about the last year. Prior to that I never had any root problems. Last few grows the clones very slow to take off but after some weeks seem to recover and take off (last grow they were very sick until I started using some great white).
