Marijuana leaves turning yellow and dying

So i feel how my kids are dying i am trying to do whatever i can but it's not enough few days ago the leaves from the indica started to dry up completely and fall off the plant. My amigo sayed it's from the sun and that the window and it's getting too hot. Can you help them ? I am growing on sun havn't added anything i'll take them to the jungle after few days.
http://www.picvalley.net/v.php?p=u/2971/128512701010267340331333467127WWgSjmm66vlGc9Jppsml.JPG
http://www.picvalley.net/v.php?p=u/2915/104463020915926145051333467134adpMTrjjCkOeuScpeYmu.JPG
http://www.picvalley.net/v.php?p=u/1897/1534609457122447182813334671381oXgxpKddvuJZwvVT791.JPG
btw they start curl upwards when they dry.

 

they are drowning .. let the pot dry out more before you water them.

 

I water them once in every two days is it really too much ?

 

Sometimes yes.. If its not a hydroponic grow, then the soil should dry out a little between watering.

 

a friend also said it was nitrogen defficiency, what do you think? They are all organic. Thanks a lot for the help!

 

N deficient could be a result of over watering. a balanced fertilizer should be able to correct that.

 

Really interesting. Interesting photographs.

 

looks fairly normal to me being that they are growing in the window sill........

with that being said though, i would take orison's advice in getting a balanced fertilizer and letting them dry out a bit in between waterings.......and from experience growing in a window, sometimes it can be 4 or 5 days before they need a watering, especially at that size.

 

All your plants could use some food.