Pink Brugmansia and Grass tree, Xanthorrhoea sp.
Brugmansias or Angel's Trumpets are greedy for water and fertilizer and if they are given both they are almost continually in flower. This one is at the lowest point of the garden so gets the run-off from all the water directed at plants on higher ground. It rests for two weeks in between flowering. The flowers start off yellow and change to bright pink after a couple of days.