i started gardening and I transplant my plants to a new area and I started getting these and they are growing I wanted to know what they are or if I should pull them out. The big picture is the entire garden and the other picture with a lot of little seedlings or whatever you want to call them I don't know what they are. The lighter green is spinach or lettuce and the darker green ones I don't know what they are. Are they weeds? Help please.