The theme of "Taking Down the Laundry" is the sense of loneliness a mother feels whenever the kids grow up leave for College. The poem uses laundry as the main symbol, around which the whole poem revolves. This is clear because the title itself deals with Laundry.
The favorite part of the poem to me are "I watch my son's blue shirt pil free from the line." this line symbolizes the departure of his son.