New Grower leaf burn

[macbeth05]

hi guys this is my first grow im 21 days r so in from germ .. the bottom leafs on my plants have started coming out in yellow marks was wondering am I doing something wrong
. I haven't fed any nutrients yet only waterd them..im growing them in coco choir my 2 auto blue diesel ..I also have an auto somango in genral compost and coco mix ..
1 of my diesels is far behind the other 2

 

[wwwillie]

Hey and Welcome!
They do look like that, but I am not enough of an expert to say for sure. Someone with the knowledge will let you know. There is also something regarding the coco coir, but sorry I don't recall it at the moment.
Peace and happy growing! Rest assure the good folk here at AFN will help you out! Here's some :karma Cloud: to help you out! Sorry it's all I have for now!!

 

[jayp]

The second pic looks like burn from light but the last one looks like something else

 

[macbeth05]

jayp do u thin I should flush them ..also I was wondering do they look a bit small they have sprouted now 15 days

 

[namvet25]

I would give the four bigger one a very light feeding along wth some cal-mag.wait another week or so and do the same for the smaller ones.

 

[Force]

I've seen some kind of curling spots..hows your pH??

 

[ojdiddoit]

ph and lights to close

 

[carl brutananadilewski]

Cal mag deficient