I planted a healthy Dutch Honeysuckle 'Serotina' in April and was therefore expecting a good flush of scented flowers this Summer. It has put on height (6/8'), clambering up the trellis on the front of the house (south-west facing) but alas no flowers. It has been regularly watered and fed since planting. The lower half of the plant is now yellowing and the leaves rae falling. Should I prune right back and hope for better results next year? Any advice would be much appreciated.