Help 1st Grow ... Leafs turn light green /yellow !!

duo maxwell said:

I am having the same problem. I have two seedlings in rockwool. It's day 5 and one of the seedlings has developed small brown spots on it's first set of serrated leafs. I have also been giving them bottled water, but that was because I have hard tap water. The tap water has a ppm reading of 315. I thought that would be a little much for the girls. The bottled water has a ph of 5.5 and a ppm of 30. I have been giving them only a few drops of water whenever the top of the rockwool feels dry I would say about 1.5ml. Both of of the seedlings just popped yesterday. since then i have been keeping them under a 23 watt bulb until they started showing some root growth. Sorry about the sad looking pics i was using the crappy camera on my phone for lack of a better one. I was thinking that I may have given them a little to much water.Oh and the temp is 85f and they are about an inch tall. any feedback will help as this is my first grow and I am still learning. View attachment 1501849View attachment 1501850

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hi max, wish u had bigger pics, welcome to the site! PLEASE if u havent already done so start a new thread about ur problem. I know u came here as u felt it related to ur problem, but #1, u will get much more help pertaining to YOUR plant in a new thread & #2, we try not to go into help with someone other then the person who started the thread, because some people think that is rude to "encroach" on another person's thread OR the person themselves who started it may think "hey what about me"...u know. So in saying that, I wish u had a better pic. again seedlings need little to no intervention usually, but I am not the rockwool expert, I plant only in soil. Having said that u said u only gave them a few drops on the top when it dried out, r u certain that u didnt let the rockwool dry out, thereby letting the roots get dry which can caused a stunted seedling or death? for a seedling that just popped yesterday they r HUGE & look good from my angle, bad pic or not. give some thought to what I said & please continue this in your own original post

If somebody could help me... its still growing but all new leaves tips are still burning... what should i do.. bottom leaves are getting crispy and dying.. today i cut the 3rd one..

bump someone!!?? i had to cut 2 more leaves they were all crispy brown...

ok, so a few questions: have u been checking ur ph? when u water, r u watering to the point that u have runoff? what is the temp of the room? r u using any nutrients?

my initial reaction is this plant is suffering from temperature stress, coupled with salt buildup & as well it looks like it is zinc deficient. BUT, knowing the answers to the questions, would help rule out some things, & target what is going on.