returning again with more organic tomato challenging problem.
figure out this, tomato planted in the garden this time ( different from the others in containers ), looking healthy however, the stalk of the buds is yellow !! the flower hasn't opened yet !! ,,, Why is this happening ?! ...............

healthy tomato:

Yellow bud:

HEELLLLLLLLLLLLLLLLLLLLLLLLPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP