Yellow in new growth ,Help

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goodbye95

goodbye95

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30 days babies. stunned growth . 65%Rh ,22 c . Lights at lowest intensity and max height. Ph at 6.5
Why is the new growth yellow?
 
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N1ghtL1ght

N1ghtL1ght

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Your plants are way too stretchy and even lack the strength to grow right upwards - they need morelight IMO. Try around 250-400 PPFD depending on your timer setting. Temps with lights on should be at least 25°C for optimal growth.
 
TSD

TSD

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What light is this and how close is it? It almost appears that they are bending to avoid the light in the second pic
Definitely not praying like they want more light... but also look stretched, the drooping leaves could be for another reason too... need more info.
 
Aqua Man

Aqua Man

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30 days babies. stunned growth . 65%Rh ,22 c . Lights at lowest intensity and max height. Ph at 6.5
Why is the new growth yellow?
I didn’t see this. Not leaning because of to much light if this is the case.
 
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goodbye95

goodbye95

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i placed a heating matt under the whole tent to control both the ambient temp and the soil temp. Currently my values are 70%Rh at day - 65%Rh at night.
Day temp 26 C
Night temp 21 C
Soil temp 24 C (day)
Lights at 20% intensity at 65 Cm (650watt light)
Leaf temp at 24 - 25 C
The plants look like this after 2 days in the values above . I also watered yesterday.
The super soil containes 10% coco - 20%perlite - 5% clay balls - 10% worm humus and rest is soil .
 
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TSD

TSD

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They're pretty small for over a month old... I'd guess they aren't getting enough light... they also appear to be taking nitrogen from the leaves, have you fed them at all?
 
TSD

TSD

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Do you have air circulation? They need to move a bit when small to strengthen the stem... just a wiggle not direct strong air.
 
RootsRuler

RootsRuler

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30 days from seed to soil? This would mean 2 weeks to sprout and 2 weeks above ground? If so then they look OK as far as growth. I would think they would be a little farther along but judging from your stats everything looks to be in order. The main stems like mighty thin. Could be genetics or could be they need more nutrient.

Are you giving them any added fertilizers or are you depending on soil borne nutrition?

As far as your yellowing leaves so early it looks to me like they may have some sort of lockout or root issue? What is the soil PH? I was thinking it may be coco related but I see that the SS only contains about 10%. Where did you get this soil? Was it sterile when you bought it?
 

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