Purple stems and black&brown points

K

Krynn

Well-Known Member
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

haloman420

Well-Known Member
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

xmatox

Well-Known Member
Krynn said:
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?
Click to expand...
Purple stems are typically from magnesium deficiency or genetics.
 
K

Krynn

Well-Known Member
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

xmatox

Well-Known Member
Krynn said:
Can be? All those plants are in 11l pots with fertilized soil and is the 7 day on that soil..

Should i add calmag?
Click to expand...
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.
 
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