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Yellowing seedlings slightly dark edges

Discussion in 'Marijuana Plant Problems' started by FirstTime1090, Apr 19, 2017.


    FirstTime1090 New Member


    This is my first grow so pardon my limited knowledge.

    To start I have a 300W LED light. I had it a foot from the tops of the seedlings however I just raised it quite a bit as I felt I was giving them too much light.
    Before raise: 38,000 lx roughly
    After raise: 18,000 lx roughly

    Was on a 24/0 light schedule, however I just changed it to a 20/4 last night.

    Temp is a constant 70F
    RH is between 40-50%

    The soil is nothing fancy, just a generic, non miracle grow potting soil from the store.

    The seeds germinated in under 24 hours in paper towel with a good tap root.

    The seeds were planted in soil on April 9th.

    I may have slightly over-watered, so I have cut back. I am waiting for the soil to dry on the tops before watering again. My water PH was about an 8, I just noticed this and corrected it to around 6.5

    I have not given any nutrients yet.

    Any advice? Am I killing them? I have done a ton of research on my own however I can't seem to find something that fits. I doubt its nutrient deficiency, however with the higher PH it's possible I guess.

    Pictures were taken with LED off and just camera flash.

    Last edited: Apr 19, 2017

    tpc_mikey Well-Known Member

    My guess is is the soil you have them in has no nutrients in it they look hungry, i would get a superior growing medium i.e. Happy frog or Fox Farms ocean forrest and transplant them, as for water cannabis hates sitting in a moist soil so water them and dont water again until soil drys out.

    FirstTime1090 New Member

    I have fox farms soil ready to go, I was just worried it would be to much for them. Also fox farms 3 bottle nutes. OK to transplant in the current state?

    Had read a few places not to give them nutes till like 3 weeks, that's why i was holding off.

    tpc_mikey Well-Known Member

    Truthfully if you your in FFOF and have amended it with additional wormcasting you can make it to flower with no nutes added, here is mine in 5th day of flower i have yet to give it anyting but water. And it vegged for 60days. IMG_1261.JPG
    Hairiest_Stamen likes this.

    FirstTime1090 New Member

    Wow, that's a nice looking plant. I'm not familiar with wormcasting, I will have to look into it.

    So people think I should transplant into fox farm? Then wait a day to water? Wait on nutes?

    Thank you

    sparkygeek Active Member

    Seedlings need very little to grow roots that's why most people say no nutes for 2-3 weeks... I think Fox Farm also has a seedling mix... Happy Frog? Worm castings are a fantastic organic fertilizer! No matter how strong looking the seedling I give just water for at least two weeks. I use Pro Mix CC (coco coir) with myco so it's different than soil but hopefully it provides some useful background... Best of luck!

    tpc_mikey Well-Known Member

    Yes wait on nute if going into fox farms is has everything that plant needs already in the soil, including worm casting and bat guano, just give them water for 4 to 5 weeks in that soil then top dress a few times, use the 2 first time growing techniques KISS and LITFA (Keep it Simple Stupid) (Leave it the Fuck Alone) lol, just water them and talk to them they are a weed and will do the rest.

    *BUDS Well-Known Member


    The soil is no good for seedlings or anything else, it looks crappy. Dont re pot yet it will make things worse just feed them some veg hydro nutes at 1/2 strength for 2 weeks then full str.

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