Flowers have incredible power. Their fragile beauty and brief life can teach us to enjoy without attachment, to experience deeply while knowing full well the experience is temporary. It is the same with all life... On the spiritual path it is not the pleasure we want to renounce, it is the attachment to the pleasure. Life will have its joys and its sorrows; to live fully we must live from the source, without attachment to either pleasure or pain.
Plants and animals don't fight the winter; they don't pretend it's not happening and attempt to carry on living the same lives that they lived in the summer. They prepare. They adapt. They perform extraordinary acts of metamorphosis to get them through. Winter is a time of withdrawing from the world, maximising scant resources, carrying out acts of brutal efficiency and vanishing from sight; but that's where the transformation occurs. Winter is not the death of the life cycle, but its crucible.