My 4 seedng have now come up.some our still closed .they our in rockwool then going in co co.conna be gonna feed with canna a/b not sure when to feed an at what strengh.I know rockwool and co co hold no nutes. Thanks in advance
I would wait until they get their 4th or 5th set of true leaves and then add nutes at 1/3 or 1/2 strength. If in doubt, ALWAYS go with less rather than more.
I Agree with Tim. Maybe even just 1/4 strength to start, up to 1/3, 1/2, and so on. See how the plant reacts. If you haven't done so already, read up on Nutes in one of the sticky's at the top of the thread list before you do anything with them. Good luck!