Fdd, Knowm, ..anybody that nows their stuff please have a look

After all the research I've been doing for my sticky, and all the articles I've read....I can't figure out what the heck is going on with my plants. Whatever it is, its happening to all of them Here is the low down:

4 weeks old from seed
Northern Lights and a couple of Sweet Nightmare
60/40 mix hydroton/coco
Using Advanced Nutes
PPM=600(tap water is 130ppm)
PH=6.0-6.2.....up to week 2 I had the PH at 5.6-5.9, but had issues so I raised it.
Temp=78day..65night
Humidity=40-60%
Lighting=T5 flouro couple of inches away
I will be glad to give any more info....but I'm running late and have to go do something, so I'll be back later. Here are some pics...thanks to anyone that helps...I'm freakin out

These are some leaves I cut off the bottom last night

hows your ventalation and do you have a fan on the go. good "air circulation"

I know nothing about hydro, but that looks like overfertilization to me.

the widowman said:

hows your ventalation and do you have a fan on the go. good "air circulation"

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Its all good...at least it should be. I have a fan on the floor blowing up, a fan on the wall going back and forth on high, a 270 cfm canfan, all hooked up to a climate controller. Ihave it set a little low so it will kick on more often....will poor circulation cause my problem?

I am hand watering right now....I've wanted to transplant them and start my ebb and flow but I wanted to get this problem sorted out first. I don't see how they could be over fed....it seems more like some sort of def. I started with some cal/mag when the problem was first noticed because the guy at the hydro store thought I should. I thought they were getting better but I'm noticing it start to pop up in more places.

I have done a run-off test water in at PH=5.6,PPM=141. Water out at PH=5.8,PPM=240. This was a week and a few days ago

Yellow tips is usually over fertilzation, you could always try flushing them with ph'd water and see if it helps.

I flushed them 2 times(not in a row) when the prob first came about with 5.6 water....thinking the ph might be an issue with uptake, I raised it to 6.0-6.2. I haven't flushed with this ph yet but I go on a feed, feed, water regimen.

i'd kick them in the ass with a good dose of nitrogen. have you been feeding at all?

Yup....600ppm now I gave em a kick once with 760ppm...thinking it might be that but I think it did give them some burn. Its hard to tell though if it was worse from the def...or from too many ferts. They did look a little too dark green after that.

It seems like some of the new growth tips are whiteish on the very tips. Also I am getting a little bit of "taco-ing of the leaves on a couple" I'm probably going to transplant them tomorow and start the ebb...and maybe try the ppm at 800?

The best match I could figure was a mag. def. I just gave them a foliar spray of magical with ph 6.2 Maybe it will help. I am wondering if I am just deficent in a whole lot of things.

I would say nute burn. But I'm not expert. I think the yellow would be more inform if it were N deficiency.

shenagen said:

Yup....600ppm now I gave em a kick once with 760ppm...thinking it might be that but I think it did give them some burn. Its hard to tell though if it was worse from the def...or from too many ferts. They did look a little too dark green after that.

It seems like some of the new growth tips are whiteish on the very tips. Also I am getting a little bit of "taco-ing of the leaves on a couple" I'm probably going to transplant them tomorow and start the ebb...and maybe try the ppm at 800?

The best match I could figure was a mag. def. I just gave them a foliar spray of magical with ph 6.2 Maybe it will help. I am wondering if I am just deficent in a whole lot of things.

Click to expand...

white tips is nitrogen burn.

yessir .

It looks like nute burn, but 600 ppm doesnt seem high at all. What AN products are you using?

fdd2blk said:

i'd kick them in the ass with a good dose of nitrogen. have you been feeding at all?

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fdd2blk said:

white tips is nitrogen burn.

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i have no idea why people listen to me. total contradiction of advice.

NICE, what an expert lol

Someone get Doalude! He's got my avatar.... HALP!

FDD is right on both accounts. It is possible for a plant to show signs of overwatering and underwatering. This is because once you've overwatered a plant to the point the leaves curl and yellow, those leaves are as good as gone and shouldn't be used as a measuring stick for the health of the plant. Most of the time they will stay saggy and continue to yellow until the plant is finished with them and they drop of. The newer growth is ruler and the yardstick. If the very tips are discoloring and the rest of the leaves are a dark green, then you are walking the fine line between a healthy plant and an overfertilized taco-claw sickly one.

I wouldn't neccisarily say they are white...more pale colored...almost like they are showing the first signs of what the lower leaves have. The first thing seems to be brown tips. Then the edges start to get brownish spots and the leaves start to look light colored and kinda blotchy between the veins.

Nute burn with 600 ppm at 4 weeks??

You can sort of see the pale tip in this pic. I'll post more tomorrow(they're in bed)

Just raise the ppm as high as you can without getting taco leaves. If they start to claw up, lower the ppm a bit until you find a balance.

Its not like a claw...its folding in half long-ways ....canoe style.

i don't think that's exactly true. newer growth is often fresh and green, but the remainder of the plant could be quite sick. it depends on the particular nutrient feeding problem.

the plants look a lot better to me. mg deficiency gave me the interveinal chlorosis (sp?) and also some spotting, but if you have complete nutes this shouldn't happen. since i got on some good nutrients, it's mainly nutrient amount that comes out in the tips.