Weird yellowing young plants

18 days from sprout. Noticed some yellowing on new growth.
300w led 20in from top of plants. Stays around 73-75° with 50-55% RH.
Ffof nothing added from seed. Sorry if pics dont work…still learning.
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I do know that new growth often has light green or yellowing of the leaves but I do see some blotching on some of your leaves , I’m not sure what that could be but we should wait and see if we can get others opinions .

she looks fine to me. did you recently transplant?

Nope. No transplant. Left her in a little biodegradable pot. This pic was taken 2 days a ago. My other girl looks nice and green with 1 little yellow mark on one leaf

Watch the plant…just before lites out. Then look first thing in morning…the new growth is paler and will turn green during the day under lites.
Normal…thing for a healthy plant growing fast.

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If i look closely, i see that it kinda looks like if i were peeling after a sunburn…

lets see how the next set of leaves look

Looks like it could be a deficiency to me. Are you giving them any food yet?

What’s your pH? Runoff ppm/tds/ec?
Light cycle? Watering amt/frequency?

My phone won’t load the pics b/c of bad internet service on my end. Hopefully they’ll load by tomorrow.

What does the under side of those leaves look like? It kind of looks like insect damage based on the first pic but it’s definitely a strange pattern if so.

@Niala @garrigan62 I’m sure one of you have seen this before.

Im not sure 100% sure on ph…was yellow (6ish). Ppm, no clue. Only water, no food yet.
I use deer park spring water. Could this be to heavy? Maybe blocking something?
I only water when i see they need water. Last water was on the 25th so 4 days ago.
Lighting is 18/6. 20in away. 300w led (135w true).
Underside of leaves look good.

It looks like i could wash it off…or peel it.
I have another girl that looks good but shes older and in different soil.

Oh strain is Bubblegum (ilgm)

Need to get something that actually tells the correct ph. Like this.

https://www.amazon.com/VANTAKOOL-Accuracy-Measurement-Household-Drinking/dp/B0789G7MVP/ref=mp_s_a_1_3?ie=UTF8&qid=1540816577&sr=8-3&pi=AC_SX236_SY340_QL65&keywords=ph+meter&dpPl=1&dpID=41rDHSz42vL&ref=plSrch

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It’s a Ph problem. Do you know your Ph?

Im ordering a digital ph meter…cant find one ina store.
I did do a run off test using a fresh water ph tester. Ph was around 6.
Girls dont seem to be doing bad just discolored. Pics later.
Oh and Thanks to everyone.

It’s ph and the fox farms is a hot soil so some discoloring is normal but definitely need a ph meter :wink: