Dave tackles the massive dead-heading job that the roses bring to the gardens, while head of tree collections Kevin is contemplating another epic pruning job. It's all change in front of the Palm House, where, under a sweltering summer sun, the decorative team race to arrange thousands of new plants on the parterre, while Alberto is waiting on the flowering of the titan arum, which is always accompanied by the smell of rotten meat and an influx of curious visitors.