Beneath the kiwi, she planted four lavender bushes, which do double duty: The silvery-blue foliage contrasts with the dark foliage of the kiwi, and it camouflages the vine's bare stem.
The reason is as elementary as it gets: The purpose of intelligence is to see what your enemy is trying to hide, to grasp how your enemy thinks, and how he cleverly camouflages what he thinks.