I keep leaves in a container filled with water and place it in fridge..It remains fresh and I don't take the complete vessel out...change water once in 4 days.
My late mom and spouse never keep the greens in fridge. 2. They fill a tall plastic bucket with water to a quarter or less height and leave the greens bunch to stand with it’s roots dunked in it. Next morning it would be used. Thanks and Regards. God bless the greeneries and verdant surroundings.