Lime green stunted new growth

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