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PHOTOS. Help Please, seedling looks sick

First time grow but I've studied a LOT and sure everything is good as far as my controls. Using rockwool to grow, 600w MH lights, rooom temp constant 77F day 68F night. PH 5.5. Seven days in i used a low 200PPM nutrient solution then day 12 used 350ppm solution. On day 13 from germination and three of the four look very healthy but what could be wrong with this forth one? Everything has been identical for each plant from same seedbank. Any advice would be greatly appreciated. Thank you all in advance.

I've attached photos of all four plants. The last two photos are of the one I'm having problems with.
 

Barron

Well-Known Member
How often do you water? It could be over watered. Also you might want to put them in something were the roots wont get any light. Hopefully someone else can help you out better than I can I'm still a noob myself. Good luck!
 
I've only watered twice and pretty much waited for the medium to become somewhat dry, which from what i've read helps the roots stretch down for water. Rockwool is good because it holds a lot of air and any extra water just runs through and out the bottom. Thanks for your fast reply though. Anyone with more experience than us would also be greatly appreciated...
 

Topher89

Active Member
I would definetly try to plant them into something that cannot let light through to the roots. As for the one plant that is giving you problems, it could be a bunch of things. It seems like there is some slight yellowing on the outside of the fan leaves. How about a couple more pictures of the plant that is having some problems?
 
Thanks for the input Topher. I will take a few more macro photos but they are sleeping right now and don't want to put on the lights. Soon as I can I'll take some more and post them for you to take a look. With regards to planting in something that won't let the light hit the roots I assume you're referring to the buckets I used to get started and not the rockwool cubes correct? I will be transferring them to 20 gallon planters when they're ready to be transplanted but I didn't think about the light getting through to the roots in what they are growing in now. It would be just as easy to cover the clear buckets with something that blocks out the light and that'd be fine right?
 

Topher89

Active Member
Thanks for the input Topher. I will take a few more macro photos but they are sleeping right now and don't want to put on the lights. Soon as I can I'll take some more and post them for you to take a look. With regards to planting in something that won't let the light hit the roots I assume you're referring to the buckets I used to get started and not the rockwool cubes correct? I will be transferring them to 20 gallon planters when they're ready to be transplanted but I didn't think about the light getting through to the roots in what they are growing in now. It would be just as easy to cover the clear buckets with something that blocks out the light and that'd be fine right?
For sure. Black construction paper... Duct tape... anything really. The roots just don't like any form of light. And yah, I was refering to the container, not the medium. bongsmilie
 
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