Leaves dying?

Discussion in 'Hydroponics / Aeroponics' started by redlazer, Mar 2, 2018.


    redlazer Member

    Are my leaves infected with something?

    Got a new setup here, still ironing out the bugs. Water temp is a little cool at 62f (trying to raise it now). pH is 6.

    I was thinking at first I just got some fertiliser water on them, but now I'm starting to think it's growth of some kind.


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    Larry3215 Well-Known Member

    How much are you feeding them? Im no expert for sure, but it looks like it could be nute burn to me.

    JSB99 Well-Known Member

    Looks like nutrient deficiency. Have you fed them anything yet? If not, you should make a small amount of soup (nutes in water), and fertilize them. Water them until about 20% drains out, then dump the spill dish. Only make a small amount because most nutes are only good for a week after mixing. You won't be needing much at all, for those starts, so don't waste your nutes.

    Don't worry about your damaged leaves, as they won't recover. Watch the new growth to see if the problem persists. As long as there's some green, she can still be worked with, so don't panic :-)

    Most mixes for starts are 5ml (1 tsp) to 1-gallon of water. Check to make sure.

    And finally, check your pH level after adding nutes. Nutes affect pH levels. What kind of nutes are you using?

    redlazer Member

    I was very careful to follow the label. It has a listing for seedlings, which I followed.

    I checked the pH after, it was at 6, but I'm wondering if my meter is bad. A new one arrives today.

    We did add nutes a little late, but it's been about a week I'd say with nutes now.

    This is the stuff I'm using:

    Attached Files:


    JSB99 Well-Known Member

    You'll want to invest in some calibration solution/packets. These pens always need calibration. Get in the habit of checking it weekly. You'll come up with a quick routine in no time. Did you get a new one because you thought it wasn't reading the correct pH? You probably just needed to calibrate it. The meters will come with easy instructions on how to do this. If it came with pH buffer packets (which is the same as calibration solution), get some distilled water or de-ionized water to mix it. Mix the packets in jars with lids, as you'll use them all the time. Leave the pen in a glass of the distilled water, when not using.

    In the meantime, just keep an eye on them. The newer leaves have a little bit of deficiency, probably from what was going on before, so keep checking new growth. If it's growing, then that's good.

    JSB99 Well-Known Member

    Larry3215 likes this.

    JSB99 Well-Known Member

    BTW, nutrient burn will turn the tips brown. When you see brown spots in the middle, it's usually some sort of deficiency. Check out the link, it'll show you a lot of things to watch out for, and prevent problems before they start :-)

    JSB99 Well-Known Member

    One more very important thing...

    You need to make sure your pH is within the correct range. Balanced pH is what plants require, to uptake nutrients. So, if you're watering with nutes, but it's not the correctly pH level, it's like you're not providing the plant with nutes. If your pH pen was out of calibration, it most-likely gave the incorrect level.

    Plants "feed" off light, and nutrients are more like vitamins, the plants need.

    Keep posting pics, and let us know how it's going.
    Last edited: Mar 3, 2018

    drgreentm Well-Known Member

    No way JSB, come on, your saying a tiny seedling with a taproot a couple leaves smothered in a soggy, mushy rockwool cube being fed (bottle recommendation strength) fertilizer is deficient? Sorry man but numerous people, including myself, gave this guy solid advice and he continues to ask the same question just in another section.

    @redlazer man what is the SOURCE, EC/PH of your water being used for this??
    Pics of roots and stems and such would be helpful also info on the system (watering frequency and duration).Can’t help you if your just going to ask everybody on the forum until you get the answer your seeking (which I’m assuming is “feed more”). If you can’t supply even the basics then you already off to a bad start. At any point in growing you come across a abnormality in your plants like this, cut off fertilizers, flush good, reintroduce nutrients at 1/4 the strength and observe, if plant still appears hungry up it from there. This should be the basis in which a inexperienced grower, like yourself, should follow all the way through your first grow. This plant appears to be phosphorus deficient right? I don’t think so. you have over fed this plant and more than likley with nutrients of lesser importance,(Fe) iron and (Zn) zink in abundance (not necessarily too much concentration but too much for the plants liking) and you will lock out a plants ability to uptake (P) phosphorus which directly effects the uptake of (N) nitrogen and (K) potassium, which will cause a plant to halt photosynthesis , which your plant has done, you see the snowball effect here right lol. Phosphorus can also be locked out by overwatering (IE soggy ass rockwool cube in a aero system you have there) and ph of the ROOT ZONE not necessarily the water but where the roots dwell.

    Anyway, hope you get going and have some fun along the way. I could be wrong but remember you can always give a hungry plant a little more food but when you overfeed the the damage is done and recoup time can be quite a while.

    Again could be wrong but hasn’t steered me wrong
    JSB99 likes this.

    JSB99 Well-Known Member

    Ah, the big picture suddenly makes an appearance!

    At first glance it looked like deficiency due to unbalanced pH. But I did notice that the cube is pretty damn soggy. I guess it's his fault that he's not taking good advice.

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