help... nute burn or deficiency im confused??

[fractalcat]

Hey, so my girls are having some issues. I'm 2 weeks into flower on my first grow they have been getting regular strength nutes and seemed fine until the lights came on... Growing in ffof and using fox farm nutes. Was almost positive before it was nute lock out because they looked really deficient and yellow but then that cleared up after flushing them and resuming nutes... But now this, so I'm confused.

Yes. I PH my water, and use a water filter, feeding at 2000ppm (that's what foxfarm recommends at this stage?)

Like I said its my first go at this but this chick needs some advice, thanks guys!

 

[az2000]

Looks like Mg def due to being between the veins. But, looks like Ca def being rusty. Ca def usually looks speckled. Mg a pale fade. Has it been like this for awhile? Also being on the edges, looks like nute burn.

If you're feeding full strength, I'm thinking salt buildup. Whenever it looks strange and multiple problems, and that stage of life... I think overfeeding, buildup.

2000ppm? That's the 500 scale? EC 4.0? That's awfully high. I don't think I've gone higher than 1200 (2.4 EC).

 

[Dumme]

 

[whitebb2727]

I would agree with salt build up. Flush with 2-3 times pot size with water. Let them dry then start feeding at 500ppms then work back up.

 

[Alienwidow]

From the look of the plants id say theres nothing super wrong. Theres no hard yellowing yet at two weeks of flower so thats good. Theres no leaf curl so theyre not nitrogen overloaded. And theres no burn tips which also screams feeding too hard. The leaf is showing signs of what looks like from my expirience mag deficiency. So if you arent already, you probably want to be running calmag. Even if the calcium def isnt showing yet, the oyster shell in the fox farm soil is probably almost all gone by now.

 

[polishpollack]

2000 is too much. 1000 ppm is more like it.

 

[fractalcat]

Thanks everyone for the advice, I flushed last night and use foxfarms sledgehammer which is supposed to remove salt build up. I didn't use it last time because it had 2 bad reviews online and I got super scared, but my thought is foxfarm may have designed it to go along with their nutes because lockout may be common because of how strong their nutes are ? (they recommend using it 3 times throughout) .... So I flushed and we will see if they show improvement!

Im also going to adjust the ppms to around 1200-1500?

Thanks again guys

 

[az2000]

Im also going to adjust the ppms to around 1200-1500?

What scale is your meter? (See this chart). I'm thinking you're using one of those higher scales (if you were able to do 2000ppm without serious trouble.).

Please follow up in a week or so about how your plants responded to the flush. I'd like to know how that works. I personally would not have treated the problem that aggressively, with the additive. The plants look relatively healthy and not requiring drastic action. I'm curious to see how they respond to that.

 

[polishpollack]

you really shouldn't be requiring nutes at all if you're using ffof. I'd flush and just let it be for a while and see how it does. should be okay.