Someone help!

I have a problem with my ladies, I have four ladies that are growing quite nicely in FF coco loco, 5 gal pots, 400w hps Apollo lights VENTECH 6" fan and carbon filter. 2 grizzly purple auto and 2 northern lights auto, the tips on the leaves on 3 of the girls are turning yellow about mid way and up to the new growth. I've been feeding them full strength nutes every watering lol, so I was wondering if it was nuts burn, but the tips aren't browning and coming off so I was thinking copper def. or mag or sulphur, I want to fix this fast. I've been using boiled PH'ed tap water at around 6.2. Thanks guys

Can't see anything with the hps...

You need to take photos with a regular light.
HPS is very poor for pictures.
Try using a flash or use a bright room light to take pics.
DZ

Here's a little better picture I have no light in the room they are growing in I'll try to take a better one soon

Looks like you have the start of an nutrient toxicity.Back off the nutrient ppm a little

Should I do a flush? Then feed them half strength after the flush?

Nah just watch it doesnt get worse...feed with half strength nutrients at next watering.If you have a ppm meter collecting the runoff to measure would be useful data.Just looks like a little tip burn at this point

Make sure you are getting about 25% runoff or so

Thanks man appreciate it. I was hoping no other deficiencies, I mean the leaves look healthy other than that I honestly think the fox farm is hot soil and the one that isnt showing any signs of nute burn is the one that is in a personal mix. Nut it seems that all the new growth is coming out with yellow tips, is that part of too many nutes? Thanks for the help!

Yh it is mate,
Try and bookmark this site I find it helpful in these things it has pics and symptoms

http://www.royalqueenseeds.com/blog-cannabis-nutrient-and-deficiency-table-n88
Hope it helps and good luck with em mate

Thanks man, and i know i sound stupid but what is YH?

TH86 said:

Thanks man, and i know i sound stupid but what is YH?

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Yeah/ yh is for short lol

And the yh was, yeah for excess nutes caused your tips to go light...

That's the first sign then the tips and sides the half a leaf at a time I think in that order, I never had over feed apart from nitrogen wich was a full on claw.

No question is a dumb question, we are all students with our own little bit of knowledge so we share.

So ask away mate there are idiots here but I'm sure you will son find the ignore thing

Life is educational .... i think anyways

Don't worrie about it they look fine take photo's during lights off,be able to have a far better look

In FF soil you don't need to feed until they are 3 to 4 weeks old and then start at half the recommended strength of your nutes .

Honestly it just seems to be where the light hits is where the tips are turning that's why I thought it could be a copper def. but I have been feeding them a lot,, but will nute burn cause new growth to grow with yellow tips? I can't really take a good picture but will try to

TH86 said:

Honestly it just seems to be where the light hits is where the tips are turning that's why I thought it could be a copper def. but I have been feeding them a lot,, but will nute burn cause new growth to grow with yellow tips? I can't really take a good picture but will try to

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Yes! The yellow tips are Nitrogen overdose.

From the pic it looks like nute burn , just back off how strong you're mixing it or feed every other watering .

Thanks guys, you have been more than helpful, doesnt seem like its stunting growth at all, i mean a couple inches a day here lately and im not kidding, these autos are getting huge and I didnt think they got that big, my biggest one is over 2 feet tall already at 24 days old lol

Let me know if the grizzly purple auto turn's turple towards the end of flowering please dude

tyke1973 said:

Let me know if the grizzly purple auto turn's turple towards the end of flowering please dude

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Ive heard that they should turn purple with cooler temps, so im gonna make the temps a little cooler...But i will let you know !