Update: 23 April, 2017 - The pink coral is reaching far now, and the white plumbago has grown.
I just need the white plumbago, and (espaliered) bougainvillea to fill the fence area on the right of the red robins.
Update 26 Sept, 2017:
There red robins are looking good, tall and strong, and spreading. It's 9 months since the first shots at top of this post, and we have had little rain. The pink coral is dry and shrivelled, though not completely. All plants are being sustained by my regular waterings.
Update 26 Nov 2017:
Some good growth since last April 2017!