Chow_13answered grow question 2 years ago Rapid growth can cause the new growth to look a lime green. Everything looks normal to me.
Not sure what your soil is and if it has any nutrients in it, Also see you have not fed any either,
So if your soil has no food it could be caused by a lack of food.
They are at the stage where they are no longer feeding off the seed reserve food and start looking for food to uptake.
Good luck and Happy Growing