Yellow in new growth ,Help

[goodbye95]

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?

 

[N1ghtL1ght]

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.

 

[Shaded_One]

Cotyledons are long gone at this point, also need to start nutrients asap.

 

[Aqua Man]

What light is this and how close is it? It almost appears that they are bending to avoid the light in the second pic

 

[TSD]

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]

Definitely not praying like they want more light... but also look stretched, the drooping leaves could be for another reason too... need more info.

Yeah i think there was a lightning change recently

 

[goodbye95]

What light is this and how close is it? It almost appears that they are bending to avoid the light in the second pic

Spiderfarmer sf7000 650 w and it is about 120 cm from the canopy

 

[goodbye95]

i have made a super soil with organic dry amendments.

 

[Cirroji]

Spiderfarmer sf7000 650 w and it is about 120 cm from the canopy

i used a SF4000 at only 40% for my little ones and that was almost too much for them - what percentage is your dimmer at?

2 ft is pretty far - i've staved between 18=24 inches since i have no clue of the lights power after that far away

 

[Aqua Man]

Spiderfarmer sf7000 650 w and it is about 120 cm from the canopy

Yeah id turn it down to 50% max and see what they look like in 3-4 days

 

[Dummy buds]

Do you have them on a dark cycle, or 24 hour light?

 

[Aqua Man]

Do you have them on a dark cycle, or 24 hour light?

Good point here

 

[N1ghtL1ght]

Lights at lowest intensity and max height.

how much power draw from the wall would that be (sorry not familiar with that brand)

 

[Aqua Man]

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.

 

[goodbye95]

Do you have them on a dark cycle, or 24 hour light?

18-6

 

[goodbye95]

how much power draw from the wall would that be (sorry not familiar with that brand)

about 60-80 watt

 

[goodbye95]

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 .

 

[TSD]

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]

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]

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?