Red steam, stagnant growth

[Gardenic]

Hello there!
We have a little problem

Plants steams turn in dark red/purle.
slowed down with grow

Light 8x10W led 3000k 806lm
temp ~27C(20C night) humidy ~60%

i have air humidifier, giving in a little cool water vapor in the lower part of the plant, maybe that is a problem?

soil is Substrat Jiffy Rooting Hormone
pH: 5,8
EC: 1
Start fertilizers 17-10-14-4: 1kg/m3FibaZorb: 0,25 l/m3
+
mycorrhizae


wather 6pH (i know i dont have to check, but still..)
1.5L water +fishmix (5ml/1L)

Any suggestions?
Greeting

after spraying*

 

[Lester Beans]

Need to lower that humidity. Lose the humidifier.

Get a fan on them and see if you see any changes. Keep the RH below 50%.

 

[Gardenic]

ah i forgot. Yesterday i swich to 12/12

picture taking after spraying with water+fishmix, attempt to complement the deficiency.

normal picture from the few days before.

 

[Dave Coulier]

OP, sometimes plants just have red/purple stems, and its not related to a nutrition problem. Your plants dont look bad. They look fairly healthy and green from the last pic you posted. 60%RH is fine as well, too low and your VPD(Vapor Pressure Defecit) will be out of whack.

Do you feel the plants have lost some of their luster, not as green as they used to be??If the lights are too close, your upper canopy will become chlorotic and growth will slow dramatically. I notice this often when I let plants in veg get too close to the T5's. They recover as soon as I put them further away with lush new growth.

 

[MJINC]

Are you getting any red on the leaves on the bottom or is it just the stems? If there aren't any other symptoms then I would leave things as they are and monitor carefully. It could just be the genetics or it could be a precursor to something else so keep a good look out for any other possible symptoms

 

[Gardenic]

Thanks You guys for help!
Veins leaf and stems are red. I switched off humidifier, plant looking a far batter, but the leaves are bent to the top. I give them more phosphorus and we will see How it will look in a few days

 

[Finagleabud]

60%RH is fine as well, too low and your VPD(Vapor Pressure Defecit) will be out of whack.

Can you elaborate on this? Never heard of a VPD before, and during the winter my humdity is usually around 10% or lower and the plants don't seem to mind a bit. How crucial is it?