Quote Originally Posted by DreadedHermie
Maybe someone familiar with the Canna line will jump in. My very limited understanding is the A+B is supposed to be complete, and designed for coco. So I'm not sure what the Rhizo / Cannazyme might be doing for you at this point. My uneducated guess is that it's not needed.

Calmag is generally recommended if you're using distilled water, esp. in coco. But again, A+B may cover that requirement for you. You might wanna research that, sorry, IDK. Seems like a lotta stuff for younguns, especially sativa-types which can be very light feeders.

I normally alternate feed / water in coco. If feeding every time, I do a little more runoff (~25%) and tune the nutes a little lighter to prevent buildup in the medium. I would definitely check the ppm of your runoff, and compare it to what's going in. Might be too hot. How were the plants doing at half-strength nutes?

I have seen lots of folks have problems trying to veg under HPS. OTOH, lotsa peeps here get good results with it, but 24/7 @ 600W seems like a lotta power for seedlings. I'd be doing this under a couple 6500K shoplights and save some $, if nothing else. I really like bluer lights for veg. YMMV.

I'm gonna suggest your pH may be a problem. If you're putting in nute solution at 5.8-6.0 and it's coming out at 5.0, the pH of your coco medium's gotta be lower than 5.0 to knock it down that far. If your pH in the pot is <5.0, you're risking "lockout," which simply means your plants can't use whatever nutes may be there (nitrogen included).

A thorough flush (3X pot volume) followed immediately with a light feeding should help. At least, in coco, it's not gonna hurt... pH below 5.2 in coco has been ugly for me...
Thank you very much for helping out!

I am totally with you on the ph causing nute lock-out, so I flushed them yesterday with straight distilled water. I am going to get a RO unit this week so flushing will be much easier. I don't know if it is my eyes, but the new growth seems greener today!

After some further research, you are certainly right! It looks like I should have been alternating between feeding water and plain water to rinse the salts out.

I did raise the light as well, as to not "blind" the girls.

I will measure the runoff of my ppm later today and report back.

Other than that, is the low humidity an issue?

Thanks again :thumbsup: