Purple stems and black&brown points

[Krynn]

Hi!

I have a tent 4x4. 2x2 are powered by 8 vero29 75w each. And the other 2x2 are with a sodium 600w.

32 plants. Temp 23 on leds and 25 on sodium. All are clones and stay in the 6 day at 18/6. The 2x2 sodium is ok, but in the 2x2 of vero all the stems are purple, and the oldest leafs start to have points black and brown.

All plaints are in fertilized soil.

At moment i'm wattering with rizotonic only. Ph first time 5,8, second 6.0 and 3time with 6.1. Ec ever in 0.38. And humidity 50%-60%..

What problem i'm having? And why it's only on the led side?

Variety is chocolope and it's not genetic becouse i had that some times. Can be purple stems N deficiency?

 

[haloman420]

Pics would help. Some plants stems are purple do to genetics. But the problem seems to be more than that by what you described. Without pics I want to say you are dealing with a magnesium deficiency.

 

[xmatox]

Hi!

I have a tent 4x4. 2x2 are powered by 8 vero29 75w each. And the other 2x2 are with a sodium 600w.

32 plants. Temp 23 on leds and 25 on sodium. All are clones and stay in the 6 day at 18/6. The 2x2 sodium is ok, but in the 2x2 of vero all the stems are purple, and the oldest leafs start to have points black and brown.

All plaints are in fertilized soil.

At moment i'm wattering with rizotonic only. Ph first time 5,8, second 6.0 and 3time with 6.1. Ec ever in 0.38. And humidity 50%-60%..

What problem i'm having? And why it's only on the led side?

Variety is chocolope and it's not genetic becouse i had that some times. Can be purple stems N deficiency?

Purple stems are typically from magnesium deficiency or genetics.

 

[Krynn]

Can be? All those plants are in 11l pots with fertilized soil and is the 7 day on that soil..

Should i add calmag?

 

[xmatox]

Can be? All those plants are in 11l pots with fertilized soil and is the 7 day on that soil..

Should i add calmag?

Personally I would add epsom, either foliar or top feed. Soil typically needs Cal/mag or Epson in the mix. When I grow outside i'll start with FFOF and I have to add epson or else I'll see deficiencies.