Yellow New Growth

[detanvil]

Can anybody help with diagnosing this issue with my yellowing plants.

Happy Frog Soil
Temp 73-78
No nutrients to date except for one dose of Calmag for the yellow plants.
600W MH Light
PH water 6.3-6.5
Light fan on plants
6 of the 11 are doing well

Appreciate any help. Oh, the plant on the far right is a science experiment that failed

 

[Lazarus13]

Only thing i could dig up on yellowing new growth is Sulphur deficiency. They recommend using epsom salts as a treatment. Maybe someone else will chime in with something better but Google it and check it out.

 

[detanvil]

That was what I was thinking but its weird only on 5 plants. I just cant figure it out. Growth is good. It sure does look like sulfur though. Just hard to believe. Im starting Sensi Grow A and B this week so Ill have to see if sulfur is in those. Epsom salt is something I will try. Thanks!

 

[Lazarus13]

Pretty sure sensi line has sulphur but you can add epsom at around 1Tbs/gallon until then

 

[detanvil]

Pretty sure sensi lone has sulphur but you can add epsom at around 1Tbs/gallon until then

I will do that and see what happens. Ill update. Thanks

 

[daTenshi]

Is it possible they got bleached by the light? Try to keep the air above them moving and as cool as possible. Maybe check if the light is too close.

 

[187budz]

Transplant them

 

[Lazarus13]

Transplant them

Lol yeah. I didnt even notice the pot size when i first looked.

 

[187budz]

Always fist thing I look at when it's new growth turning yellow.

 

[Happy Farmer]

They're just getting bound transplant em and they'll be beautiful again in 7 to 10 days. If you're in a smaller than 4'x4' dim the 600 down