Is this Ca def. or what?

[RedEye69]

This is happening toward the top of the plant. 3 weeks into flower. From what I have read it looks like Ca def. to me, but I am still learning.
[attachment=o133524]

RedEye69 Reviewed by RedEye69 on 04-30-2007. Is this Ca def. or what? This is happening toward the top of the plant. 3 weeks into flower. From what I have read it looks like Ca def. to me, but I am still learning. ;) Rating: 5

[elstonite]

could be leaf spot fungus , im still learning so dont just take my word for it lol

do a search for that and see if your leaf probs are similar :stoned:

[stinkyattic]

Can you post a pic of the entire plant too?
I also see a leaf that is cupping downwards, like a N overdose or being rootbound.
But those spots don't strike me as Ca. You would be seeing a different pattern of necrosis from my experience fighting Ca def.

[RedEye69]

Here are some more pics. The leaf you see cupping is on another plant that looks like pure or mostly Indica. It has been doing that for a good while now. I don't know what strain they are, as they were given to me. But they are supposed to be very good and from Amsterdam.
[attachment=o133561] [attachment=o133562] [attachment=o133563] [attachment=o133564]

[RedEye69]

I forgot to mention these are in a flood and drain system in 6" rockwool blocks.

[stinkyattic]

hmm if it's the 4th pic that shows the same cupped plant, I'm gonna actually say mostly sativa on that one... pretty skinny fingers there.
So are you using calmag plus?
Honestly the plant overall looks nothalf bad.
But I'm not going to really try to make a recommendation since it's a hydro system. I'm sure someone will have some hints.

[RedEye69]

I also should have mentioned that I am using GH 3-part, Latewood's formula, with Cal Mag+, H2O2, Superthrive, Floralicious Bloom, and Liquid Kool Bloom in distilled water. 1426 ppm. pH 5.5-5.8

[RedEye69]

Here's another pic of a leaf from the one that is cupping. Those leaves look skinny because of the camera angle and the cupping, I guess. I have also heard some strains do that naturally, but I really don't know. :thumbsup:
[attachment=o133567]

[Chabnoc]

I have heard that cupping under along the sides is caused by Iron definciency.

[Weedhound]

Try his thread and see if it helps....International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!

That looks like too much of something to me rather than not enough of something.