Deadhead the pink Pandorea throughout the flowering season by snipping or pinching off dead flowers.
Release the portion that you are pruning from any fasteners attaching the vine to the trellis.
Prune from the top of the pink Pandorea to the back of it. Remove dead stems and those that appear weak. Make the cuts half an inch above a bud. Remove no more than a third of the plant during each pruning session.
Rake the soil around the vine to remove pruning debris. Bag it and dispose of it or compost it.
Fertilize the pink Pandorea after pruning with a 5-15-5 fertilizer, at the rate suggested on the label for the size and age of your vine, and water the top 6 inches of soil to soak the fertilizer into the roots.