Hi! Does anyone know what kind of deficiency that ...

Cod_Fish_Joe commented week 17 0 second from now Im no guru, but It looks similar to what happened one of my previous grows. I figured it was to high a salinity in the soil from feeding at to high an EC/PPM, combined with under watering. This lead to dry spots in the pot, and because the soil was so salty, it was starting to wick moister from the plant. I had it pretty bad though. Just a thought.

Probably lockout or ph. Gentle flush, then light nutes.

Too much water

Probably a calcium deficiency

Id agree with too much water but also if u havnt given anything but plain water wouldnt it be time for cal mag??

Nutes or too much water I made the same mistake we all do it. Although I have some zkittles cuttings that look buggered but they had a mighty mite infestation at one point so I treated the life out of them to save the rest. All of the small leaves went deadish. With checking for bugs mate you never know.

it's overwatering... let dry pot and wait..., touch leaf to check that and if it's not so thick, it's that.

Con todo lo que ma estas abonando seguramente sea un exeso y no una carencia, puede ser que tengas un ph perjudicial y no esta absorbiendo, o que tenga mucha salinidad en las raizes, regala con abundante agua y se va a recomponer

hey there growmie, i'm late to the party but the problem is still here so why not? anyway it's root problems as i can tell from the downwards curling of the leafs , just cut out that "extract" thing and replace it with humic acid, which should break down the problem roots and the plant should make a complete recovery

Let her dry out she is drowning u gonna have major problems if she stays wet👍👍

Its no defiency, for that iam sure. looking like spilled feeding or burnt waterdrops

That's your problem right there is pH. If you don't pH the plant can't absorb proper nutrients. Then that turns into nutrient defeciency. Always pH from first day you plant seed till you take shears to her on chop. Soil needs a pH of 6 to 7 pH. Higher pH in veg mid to low in flower. Another thing I see is your having water on leaves when grow light is on that's a no no. Water droplets are a magnifyer when grow light is on and will burn the leaves. Best time to foliar feed is 5 to 15 minutes after grow light turns off.

Hi fellow they lool like stained, dunno if it is a deficiency yet... I suggest to leave her be because the rest of the leaves seem fine. I wouldn't care much of those first two leaves as the other newly growing leaves seem healthy. The first two leaves frequently look like sick or deformed. Watch her closely.