Thanks for the help. I don't think they could be over watered. I do not get any runoff and the coco is pretty dry.
Betcha you've got a build-up of nutes causing a lock-out. This is why so many experienced growers really like to water/feed until they get at least 20% run-off. They look either burned, or nute-locked to me. I think I have some photos of some girls from a couple of years ago that look a lot like that, but damn if I can remember how I worked it out. They were in soil, too, rather different beast.
I use the 7mil per gal of A and B mix. 1mil Roots.
Should I use just water every other day?
I forgot to mention that the first pic is from over a week ago. The next 2 pics are from today.
Thanks you.
Progressive nutrient burn! Totally cut the fertilizer until new growth does not show signs of leaf tip burning. Just to be sure, double check heat, distance from lights, etc., in case there are other factors acerbating the chemical burn. When it is safe to restart fertilizing, begin with 1/4 the amount you were using & gradually build up to recommended dosage.
Totally cut it in coco? Hmm...
VapeIt, I've got a couple of questions for you.
First is do you check and adjust the pH of your mix? If not, again, with coco you
must or you'll quickly get lockouts, etcetera. Primo pH for coco is 5.8-6.2, and most folks like to keep it at an even 6.0 for peace of mind and ease of use.
Second is, is there a reason why you don't feed to the point of at least some run-off?
If you're letting the coco dry out completely between feedings/waterings, and you're
not feeding/watering to the point of run-off, my guess, based on very limited experience, is that you've got a build-up of nutrients in the media. Personally, I would recommend a flush with RO water one day, then start feeding again with lower dosing rates (for instance, if you use 5ml/1tsp of Canna A, then cut it down to 2.5ml/1/2tsp.
I am completely unfamiliar with the Canna line, but if I recall I believe that others have said it does
not require supplementation with calcium & magnesium. That said, you should know that coco has some interesting properties that create a situation where the coco itself locks onto calcium and magnesium in a manner such that the plant can't use it. This is why coco growers are always on about
Ca/Mg.
The other bit, which I cannot explain very well, is that this can create problems with phosphorous (P) overload or lock-out, and that's the problem I'm thinking you have, not Ca or Mg.
And, all of
that said, you should know that I personally am not 100% positive that that's the problem you're having here (the phosphorous bit). I *am* positive that you have to begin checking, and adjusting if necessary, the pH of your feed, and if you're not using reverse osmosis (RO) or other low TDS water, you will find it necessary after this grow. I know I did.