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Thread: Help! Seedling cotyledons yellow and dying

  1. #16
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Anyone have anything to say about the new set up? Or about how my plant looks now compared to how it looked before? (pics on first page) I'm hoping with my new seedling it will grow correctly this time I'll post new pics tonight. From what i saw this morning the stem looks purple but its very thick unlike my previous grow, I'm guessing its because the lights are better quality and its close to her so she doesn't need to stretch to far. Anywho any comments welcome I'm new at this game and all the feedback I've gotten has helped me out a ton!
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  2. #17
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    OH! also I realize the tin foil is bad. As soon as I can find mylar or panda polly I will be switching to that. I'm hoping in the next few days
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  3. #18
    420 Member voltron's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Quote Originally Posted by tnoldon View Post
    Anyone have anything to say about the new set up? Or about how my plant looks now compared to how it looked before? (pics on first page) I'm hoping with my new seedling it will grow correctly this time I'll post new pics tonight. From what i saw this morning the stem looks purple but its very thick unlike my previous grow, I'm guessing its because the lights are better quality and its close to her so she doesn't need to stretch to far. Anywho any comments welcome I'm new at this game and all the feedback I've gotten has helped me out a ton!
    Tnoldon, IMO the cfl's will do great for your seedlings, although you will more than likely be using that hps in the future. Keep them (cfl's), as close to your plants as you can without burning them as it looks like you have that under control. I am currently using 27 watt cfl's for my first hydro/soil grows. I think I messed up the soil grows by adding a lil bit of nutes too soon, I've flushed them and repotted and will see if they grow past the two sets of small leaves they have. It has been a little over two weeks on them and two days since the transplant, and they are just one step past yours. Make sure you don't overwater them as well, I am new to this but from the many threads that I have read it appears that by allowing your roots to search for water thru the soil is better than providing them with too much water. So let the soil dry a bit before re-watering with ph'd water. Start a journal since you can post photo's, you will get a lot of love from experience growers and us newbies! You can also check out Cabinet grows, diy's. This along with the help from everyone else here as assisted me greatly. BTW, the Hydro grows are coming along nicely for cfl's, which I had planned on using for vegging and flowering. Different/mixed spectrum for flowering.




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  4. #19
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Thank you for the info voltron. I have a grow journal started Ill put the link in at the bottom so you can see the pictures. I'll also put up a new picture of the seedling today. I'm hoping this seedling will actually grow and get more then 2 sets of leaves this time. If you can could you post some pics of your plants? I'd like to see what they look like compared to mine? Since you have essentially did the same thing to your plant as I did to mine, what is your opinion on them recovering? Its almost been 16 days and the large plant still looks like a 3 day old plant and I have seen no growth what so ever.

    Anyway here is the seedling at day one:


    Here is 4 days later:
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  5. #20
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Here is the link to my grow journal:
    http://www.420magazine.com/forums/jo...-man-grow.html
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  6. #21
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Here is an update of the lemon skunk. SHe is still growing but the yellowing has gotten worse.

    Lemon Skunk:
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  7. #22
    New Member Tyrone Hamilton's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Too much love will kill a plant quicker than anything... not sure what the problem is with the lemon skunk, but might be a PH problem.

    The best advice I can give is to be as patient as possible with your plants as they need time to adjust to ANYTHING you do... changing their environment too often will shock and stunt them.

    Yellow on old growth usually means the plant is using it's old leaves as food, but this doesn't mean feed them - often they can't eat if it's too wet, their roots haven't developed, or the PH of the soil is off... if the yellow moves to new growth, then you really have a problem, but so long as the plant shows signs of growing, just leave it and do the minimum of watering when it's dry... just let it sort things out for a bit.

  8. #23
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Ok so this pertains to this post. My seedling that I have just planted and that was looking healthy has now fallen to the yellowing of the cotyledons. Is this because she is in MG soil? The water ph is 6.7 so I know that the water isnt the problem? Let me know if there is anything I can do to counter this? I'm afraid to try and transplant to new organic soil because of shock to the plant but if thats the only thing that will work I guess its best.

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  9. #24
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Here is the older lemon skunk plant. And the yellowing has now spread to the tips of the second set of leaves. So did I just waste a lot of my time? because it seems theses plants are getting worse and aren't gonna make it? it was my first grow attempt I'm sure not everyone gets it right the first time. Anyway again the PH levels are fine BUT I have not checked the ph from the run off. If this is bad how to I fix it? Should I lower or raise the PH of the water to correct the issue with the soil? Anyway here is the picture.
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  10. #25
    New Member Tyrone Hamilton's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    I've certainly had problems with MG soil and other plants; never tried cannabis, but it could be the culprit, especially if its the "moisture control" variety... over priced mulch IMHO.

    I like to use inert media to start seedlings - peat, coir, rapid rooters.... 1/4 strength nutes... hard to mess up.

    I still think you should do nothing but water it when it gets dry... it might recover... doing too much will certainly kill it.

  11. #26
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Thanks OBCGardener. So I guess I'm gonna try waiting if there isn't much to do. I will just use rockwool for my next grow then transplant to organic soil. Will organic soil contain any nutes that could end up doing the sam damage as MG?

    I really hope these girls make it again I've spent a lot of time and money on these plants and for them to just die would really suck. I'm hoping for the best!
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  12. #27
    New Member Tyrone Hamilton's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Rockwool is OK - just BE SURE to presoak the cubes to get the PH down.

    Nothing in organic soil should burn your plants unless it has not been properly composted.

  13. #28
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    SO I am suppose to pre soak the rockwool? what should the PH be for the rockwool? I didn't even no it had a PH haha. I just got a 6 new seeds and I want to do it right this time so I'm not wasting my time effort and money. Any suggestions since I'm still new at growing other then the help your given me? Thanks again!
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  14. #29
    420 Member ItsChrome's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Quote Originally Posted by tnoldon View Post
    Ok so this pertains to this post. My seedling that I have just planted and that was looking healthy has now fallen to the yellowing of the cotyledons. Is this because she is in MG soil? The water ph is 6.7 so I know that the water isnt the problem? Let me know if there is anything I can do to counter this? I'm afraid to try and transplant to new organic soil because of shock to the plant but if thats the only thing that will work I guess its best.

    High tnoldon,

    That's a healthy looking gal. I wouldn't worry too much about the coloring at all. Remember the cotyledons act as food for your babies, so as they grow they use up the stored nutrients. As they are used there will be yellowing and eventually they will brown and fall off. So yeah she's looking good

  15. #30
    420 Member Optimus PrimeBud's Avatar
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    Re: Help! Seedling cotyledons yellow and dying

    Wow man that's makes me feel a ton better to here that! Thanks itsChrome! Glad to know she is looking good. As far as my lemon skunk plant which is like a miniature plant, what do you think of the damage that's already been done? Just tryingto get opinions form as many people as I can so I can decide what to do. She has been growing everyday and started her 3 set of leaves. But no kidding her leaves are half the size of the seedling!!
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