James, my non-gardening husband who is color blind prefers conifers and evergreens over flowers. In fact, he rarely notices flowers in the garden unless I point them out to him.
He does have difficulty identifying ripe vs green bananas.
Have you heard of new glasses that "fix" color blindness? There are a couple of different technologies out there but EnChroma seems to be the most popular brand. You can google youtube videos of people trying it out for the first time.
