BobChukowski
Well-Known Member
First real post but I’ve been lurking for a while. I’m wondering if anyone can help me diagnose my seedlings and give me some tips to get them growing again.
They’re 18 days old from seed, one has grown much more than the other as you can see in the pictures. The larger one is a White Widow Auto and the smaller one is an OG Kush Auto
The White Widow seems to be getting lighter in colour and the cotys are yellowing. I suspect the cotys yellowing/browning is the natural process but I’m unsure about the lighter leaf colour especially on the little OG. The WW has shown some signs of growth over the past few days, but the OG has been stalled for over a week with the only change being its colour.
Here’s some grow info
-3x3 tent
-4” carbon filter
-Mars Hydro TS1000 (recently turned down the intensity a bit because I thought maybe I was light bleaching them
-rockwool cubes (pre-soaked in a mild nute solution initially)
-seedling heat mat (bottom of cubes register at around 78-80f)
-temp under the dome generally hovers around 25-26C lights on and 20C lights off
-20 hours lights on, 4 hours lights off
-humidity fluctuates between 40% and 80% depending on when I get time to add a bit of water to the tray only (not watering the seedlings)
So initially I believe I was over watering them.I used plain tap water at room temp for the first week or so before switching to a very mild nutrient solution (1/4 strength)
The lighter colour and yellowing cotys scared me into switching back to just plain water.
Now I wait until the cubes feel light and just slightly damp to the touch before watering again.
What do you guys think? Why has the OG stopped growing and why are they both turning lighter in colour? I believe they should be further along in their development at 18 days. I wish I had never used rockwool because I believe they have led to over/under watering and nutrient issues but this is the situation I find myself in and need some of your collective expertise!
cheers
They’re 18 days old from seed, one has grown much more than the other as you can see in the pictures. The larger one is a White Widow Auto and the smaller one is an OG Kush Auto
The White Widow seems to be getting lighter in colour and the cotys are yellowing. I suspect the cotys yellowing/browning is the natural process but I’m unsure about the lighter leaf colour especially on the little OG. The WW has shown some signs of growth over the past few days, but the OG has been stalled for over a week with the only change being its colour.
Here’s some grow info
-3x3 tent
-4” carbon filter
-Mars Hydro TS1000 (recently turned down the intensity a bit because I thought maybe I was light bleaching them
-rockwool cubes (pre-soaked in a mild nute solution initially)
-seedling heat mat (bottom of cubes register at around 78-80f)
-temp under the dome generally hovers around 25-26C lights on and 20C lights off
-20 hours lights on, 4 hours lights off
-humidity fluctuates between 40% and 80% depending on when I get time to add a bit of water to the tray only (not watering the seedlings)
So initially I believe I was over watering them.I used plain tap water at room temp for the first week or so before switching to a very mild nutrient solution (1/4 strength)
The lighter colour and yellowing cotys scared me into switching back to just plain water.
Now I wait until the cubes feel light and just slightly damp to the touch before watering again.
What do you guys think? Why has the OG stopped growing and why are they both turning lighter in colour? I believe they should be further along in their development at 18 days. I wish I had never used rockwool because I believe they have led to over/under watering and nutrient issues but this is the situation I find myself in and need some of your collective expertise!
cheers
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