Lime green stunted new growth

The light green new growth and slight leaf twist look like an early iron (Fe) deficiency or mild pH lockout. Check your pH range if it’s above 6.5 in soil or above 6.2 in coco, iron uptake slows down. Adjust pH and make sure your medium isn’t staying too wet. Once pH is corrected, new growth should come out healthy and darker

Mobile nutrient issues start from bottom up, because it can take the nutrients from the old leaves and use it to make healthy new growth. Immobile nutrient issues start from the top like this, because the plant can't move it from older leaves, so the "damage" stays in the new growth. This looks a lot like an iron deficiency. Normally not caused from lack of iron, but rather incorrect ph, which blocks the uptake. Fix ph and you will most likely fix the problem.

I'm pretty sure it's light bleaching/burning. Doesn't look like nutritional problem to me, but I noticed your lower levels are edging on nitrogen overdose so perhaps you got a nutrients lock out caused by incorrect pH range

Grab a pH nutrient chart and have a look. I’m very confident this is an iron deficiency. If I was a betting man I’d say you not lowering pH. Some local water run their water at 7.5 which would cause you all sorts of defects. Check calibration on your pH meter or if you don’t have one.. get one. They’re a must have!

Not all deficiencies start "bottom up"..........there are mobile and immobile nutrients. It has absolutely nothing to do with "more important parts capturing light".

Trace element/trace mineral deficiency, which affects new growth..............iron or sulfur for example. A dose or three of soluble trace mineral mix should cure this in a week or two. Do not over dose.........follow instructions on the packet exactly.............giving too much in the hope it will speed up recovery is dangerous. Mix should be available from any decent garden centre, it does not need to be cannabis specific. Apply it to the root zone, do not spray/foliar feed, this can introduce secondary issues.

Friend, when a cannabis plant has deficiencies, they show from the bottom up. It does this because the upper part is the most important for capturing more light than its competitors and reaching pollination. What I mean is that your plant is fine very green with healthy leaves. The issue is temperature or PPFD, since the plant is too close to the light or the intensity is too high. That stresses the plant and inhibits photosynthesis. I hope this helps you with this and future grows.

Hi there, how far is your light from canopy ? Could be light burn which will cause similar symptoms. If your light is in right height range and not to bright, then look at your watering habits and make sure to let the pot become light before watering to get runoff !! I'd also look at your nutrients and provide a balanced feed with not only NPK but micronutrients aswell. I use TA tripart and these grow, bloom and micro nutrients are working fine for me, no other supplements so far 🤞. Try and keep it as simple as possible, too many people pump this and that into a plant to correct problems (which could be the cause of many of them 🤔 ) without getting the basics right to start with, ie environment, pH, correct watering etc. Get these right and your plants will be happy 🤗 Good luck fellow grower 👍

Looks like a S-deficiency. Paling from petiole-out and at top of plant. Not many things pale from inside-out. 4 people agreeing is insane.. lol... definitely not N-deficiency. that would start at the bottom and pale tip-in. just in case, proper watering habits: 1) fully saturate (10% runoff required for soilless context only) 2) wait for appropriate dryback and repeat. You don't choose the volume of water, you give enough to accomplish the task. dry pockets are the devil. Partial watering train shitty, superficial roots. Stick to the simply 2 steps and you can't fuck it up. If fully saturated causes any droopiness, it is a sign that your medium is poorly constituted and not the fault of basic irrigation. Add more perlite or similar next time, if so.

If i was you i would let them dry, i think it's overwatering. Good luck!

from their site. All-in-One Liquid contains Essential elements: nitrogen, phosphorus, potassium and magnesium. Microelements: boron, molybdenum, iron, manganese, zinc and copper Missing S and Fe

https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg S or Fe is my guess. maybe from bad PH or lack of it. epsolm salts easy source of S and Mg, Fe might be a big harder to source without a growshop aorund. amazon or big box store maybe. Their schedule looks like the AIO Liquid if not to be used on its own??? https://aptus-holland.com/manual-and-schedule/ Kinda defeats the name to me. sorta dumb. Wondering if its lacking some micros.

Sulphur causes new growth to appear pale yellow, starting from the inside of the plant and working outwards. Immobile in the plant, so older leaves remain green while the newest ones lack the chlorophyll to develop properly. Sulphate is easily leached out. Wet and cool conditions slow the decomposition of organic matter, reducing the amount of sulphur released into the soil. You have no diaries, so you have no idea how your pH got so low. Ammonium sulphate has worked well for me in the past, SO4 form for immediate plant uptake. However, ensure that your water is flowing at a decent rate in those pots as well. Sulphur deficiency affects respiration in plants by disrupting the respiratory chain, no respiration, no transpiration, no pressure, no water movement.

Sulphur, ussually troubles if ph is too low.

Hello there friend we can get this fixed for you pretty easily. You have 2 problems going on. 1. It seems you’re over watering just a bit. This can cause stress and the plant to stunt growth 2. If you look at the new growth and see it is really light green. This means your lacking nitrogen… I suggest go out and grab a bottle of Fox farm grow big and mix 10ml/ per gal of water. You will see the plant come back around in a week or 10 days…. Also in veg you want the soil to get dry between waterings do not worry about the plant dying from underwatering. It takes about 1 hour for a plant to come back from under watering and weeks to come back from over watering. Just let the soil get super dry then water you can even let the plant wilt just the smallest and that will tell you it’s time to water Good luck I’m sure you will do great Just remember to have fun and don’t stress to much.

this could be in a textbook try following a dich. key for discerning cannabis nutrient conditions...like the free one made by the PHD-dripping team from kiss organics (or a number of other free ones)

That looks a lot like light bleaching, try to move the lights higher or turn them down if they have a dimming option

it's overdose flush as soon as possible and feed anew