Leaves turning yellow, dying from the bottom up (pix included)

Discussion in 'Plant Problems' started by elimuir, Feb 12, 2012.

  1. elimuir

    elimuir Registered+

    Hi,

    This is my first grow... I've done a lot of reading on the subject before I jumped in, but I'm having a hard time figuring out what is going on here.

    My 6 week old plant seems to have leaves turning yellow, then dying from the bottom up. The Ph seems to range from 6 to 6.5 when I test, so I do not think it's that. I'm not overdoing it with nutrients. I water every 4 to 7 days, depending on how quickly the dirt dries out.

    Is this something that is natural? Something to be concerned about?

    The first picture shows the plant in general, the second shows the leaves on the bottom turning yellow.
     

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  2. bashmans

    bashmans Registered

    i wouldnt be too concerned, the plant is looking well. i would put it down to nutrient strength. try just plain water for a feed or two to flush out any build up of salts etc. either that or possible slight heat stress?

    im not the most experienced but thought id give an opinion seen as though no one has contributed yet.

    apart from the slight burn its a nice plant. good work!!
     
  3. elimuir

    elimuir Registered+

    Hi,

    Thanks for the reply. I wasn't sure if that was a common thing or not, so you've put my mind to rest.

    Also, thanks for giving me the tip on the burn. I wasn't sure what was causing that (or if it was burn). I have since moved my light source higher. Out of curiosity, how much space do you usually allow for between the plant and the bulb? I had it at 2 to 3", but the burn seems to point out that it's too close.

    Cheers.
     
  4. polishpollack

    polishpollack Registered+

    Well hate to say this but bashman isn't right. It's not burn, you have a low nitrogen condition in your soil. In times like this I usually recommend people use Dynagro 7-9-5 as it is a complete fert, having the calcium and magnesium needed, along with the other nutes. It's kind of pricey as you get a rather big bottle for just one or two plants, but the good news is it will solve you fertilizer issues. Just follow the instructions on the back where you use 1/4 to 1/2 teaspoon of fert in a gallon of water. I'd probably go with 1/2 tsp as it looks like your plant needs a shot of nitrogen. The yellow on the lower leaves indicate that your problem is too little nitrogen in the soil, not too much. Just be careful how much fert you use in the future as you can easily overdo it. The leaf tip burn that bashman mentions isn't from the light. It's caused by an over-fert condition but as I mention, this isn't your problem. Flushing the soil will only make things worse. Give some dynagro fert from your local hydro shop and you'll see the plant green up in a couple of days.
     
    2 people like this.
  5. PhatJay

    PhatJay Registered+

    I think bashmans was referring to the nute burn (the brown tips on the end of the leaves) this is caused by your feed being a little bit too strong. Heat stress will show as a "lip" forming on the edge of the leaves.

    You ask what height to put your light at but you don't mention what kind of light. I am assuming it is CFL, if you want some decent answers, provide some better information.
     
  6. elimuir

    elimuir Registered+

    Thanks for the suggestion. I picked some up today... we'll see how it goes.
     
  7. elimuir

    elimuir Registered+

    Yes, CLFs. I didn't know there was different heights for different bulbs.
     
  8. PhatJay

    PhatJay Registered+

    During veg/flower for best results you should aim for 2-4" in my experience. A lot will depend on how good the airflow and extraction is within your setup and what size bulbs you are using. If you see a lip forming on the edge of your leaves they are getting a little too warm. If you do try and keep your lights really close, be extra careful during first 2 weeks of flower when the plants are stretching, you will find yourself having to adjust your lights every 1 or 2 days.
     
    Last edited: Feb 18, 2012
  9. polishpollack

    polishpollack Registered+

    Leaf tip burn isn't usually caused by heat. It's too much nitrogen. The yellowing that shows on the upper leaves is mimics overfert but it's actually the same yellowing that is down below. In time, the rest of the leaves will turn yellow. If the leaf tips turn yellow, then brown, that's overfert. Let us know what happens after some dynagrow.
     
    1 person likes this.
  10. elimuir

    elimuir Registered+

    Thanks for your input. I was trying to stay to the 2" rule but got a little worried with the leaf tip browning, which I then moved them to about 4", but seeing that is most likely a fert issue I've gone back to 2". Thanks mate.
     
  11. elimuir

    elimuir Registered+

    So I whipped up a gallon of Dynagrow, watered on Friday, and the plant looks great today. Actually, the leaves look a nice dark green. I don't think I've seen the plant look this healthy before.

    From your experience, how often do you do a dynagrow infused water vs. just water? I don't want to over do it with the dynagrow. Thank you so much for your help.
     
  12. polishpollack

    polishpollack Registered+

    You're right, you don't want to overdo it. Alot of people do. It's easier to add more fert than to wash out too much once it's in your soil. As to how often to fert, it's up to you. I don't recommend that you use the fert with every watering. And don't water too much as you should let the soil dry out some. Roots need oxygen and the only way they get is by allowing the air to get into the soil, and the only way that happens is to let soil dry out some. Water in soil can't coexist with air as water always pushes air out of the soil. What plants have become used to is a wet-dry cycle which is the way nature handles things. What you're really trying to do with an indoor grow is create conditions that are like that of nature. dynagrow is a synthetic, fast-acting fert and not much is needed to make a big difference in your grow. There are a ton of ferts in the local grow shop but you only really need one provided it has all the nutes plants need to grow. dynagrow actually has two ferts - one for grow or veg, and the other for flowering. When it comes time to flower, it might be worth spending the money on the flowering fert. Just be carefull how much you use of it. Just give water in the last two weeks of life.
     
  13. polishpollack

    polishpollack Registered+

    It's been a while. What's the story on your plant?
     
  14. Lord Indica

    Lord Indica Registered+

    My white widow are in 6th week of flowering and they are turning yellow from the top down. I have read every where and all I can come up with has been when folks plants are turning yellow from the bottom up. What would cause an otherwise perfect plant to turn yellow from the top down? I have about a week and a half left for them to mature I think. Nirvana said 6-8 weeks. Thanks for any help and I hope I am not hi jacking this thread. Peace
     
  15. Lord Indica

    Lord Indica Registered+

    Addendum to previous post. Sorry, /(.Y.)\ I am in soil 5 gal buckets, I use fresh fish tank water for feeding. I did use half strength tiger bloom on one feeding but it did not seem to help. Other than that it has all been organic. I mixed 1 bag garden soil, 25 lbs worm castings, 2 bags perilite (will use 3 next time), 1 bag vermiculite, 4 cups lime dust and first weeks veg i used worm tea mixed with fish tank water. They have been amazing up till yesterday really. I am at the end of their flowering stage and really do not want to give them any more nutes, just the fishtank water. Anyone got a better idea? Peace
     
  16. polishpollack

    polishpollack Registered+

    Indica, just give water and let them die. Then harvest.
     
  17. elimuir

    elimuir Registered+

    Hey mate!

    She just went into flowering last week. The Dynagro worked perfectly! The plant stopped turning yellow and the leaves looked SUPER dark green. I've switched to Dynagro Bloom for the remainder of the flowering period, so we'll see how it plays out.

    Thank you so much for the help on this.
     
  18. colorlessworld

    colorlessworld Registered

    Mine has a similar issue, it started at the bottom with yellow appearing and slowly started having tips turn yello/blowna dn drying towards the middle of the plant now, and now my bottom leaves are turnung yellow at a alarming rate and then brownign and falling off. I was told It was a N Diffenency so I added Miracle grow and Now after reading this thread i think its over nute and I might have just made the issue worse... ANy ideas? DSC_9887.JPG
     
  19. seldomBLUE

    seldomBLUE Registered+

  20. elimuir

    elimuir Registered+

    Nice plant you've got going! I'll let polishpollack provide some insight, but this looks a lot like what happened to mine. I would guess that it's a N deficiency. If that is the case, go with some Dynagro 7-9-5.
     

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