Poinsettias must have long, uninterrupted nights to bloom and in order for the plants to flower for Christmas, they should be kept in complete darkness from 6 p.m. to 8 a.m. each night, beginning in late September, placing them back in the sunny window each day.
(uninterrupted nights; to bloom; ) Context(uninterrupted nights to bloom,List([28, 57))):(Poinsettias; must have; long)
uninterrupted nights to bloom,List([28, 57))
uninterrupted nights Poinsettias
to bloom must have
long