Leaves curl up from stem

[Mr.Wrinkle]

hey,

plant is around 2 weeks old and leaves are starting to curl up from the stem. also there is a bit of purple color on the stems, so maybe phosphorous deficiency?

Today, I've fed her half of recommended nutrient dosage 0.65 EC, pH below 5.8. Watering before that was done with pHed water about 2 days ago and before that with 1/8 of nutrients. She is in 12 liter textile pot and i've used with 600ml of water.

I've also considered heat stress but for last 2 days I've been thoroughly controlling the temp.

So my best guess is salt build up / or too acidic pH? Should I flush the plant with just pHed water until runoff ?

Also should I water 2 week old plant till runoff or just 600ml is fine? I can't check for ppm of runoff if I don't have any :/

Light is CFL 200w around 15cm from the plant, temps are between 20-28 day 15-18 during night. RH is 50%

 

[STILLSMOKIN]

Looks like light is too intense and she looks pale. Maybe a bit of nutes like you did and raise light.

 

[GoAuto6]

Is that Coco? If so your pH should be down around 5.6 you can meet heat stress at the canopy and the whole room be at the correct temp. How close are your lights?

 

[STILLSMOKIN]

Just saw you are 15cm with 200w cfl! Move that thing away before you kill it. I would go 2ft or better till she recovers and move closer if you notice too much stress

 

[Mr.Wrinkle]

Thanks, guys. It's already done. I just read somewhere that cfl you can have reaaaally close, and i got a bit of stretch on every plant so I've figured I'll try that. Thanks again!

 

[F.N.]

It looks like a bit of heat stress the leaves are trying to transpire. How is the relative Humidity?

 

[Mr.Wrinkle]

I've moved the light higher and temperature dropped so I've turn my main fan off and RH boomed to 75% temp to 19 celcius but will surely rise shortly.