It's quite typical that spiders have narrow leaves, even if they are true Evergreens. They usually don't have trouble blooming and are often vigorous growers.
I can't grow dormants, so can provide nothing there. However, how can I say this ..... some hybridizers in FL breed with strong dormants so that their plants can grow almost anywhere. And yet many of the resulting cultivars are classified as Evergreens. In my garden ... and that's critical .... in my garden, many of those cultivars have narrow leaves and after two or three years they are still sitting there with a skimpy clump and lackluster bloom performance. Due to environmental issues this year, I'm loath to remove some of those in the fall, but I think I've just got to do it.
Other Evergreen plants have narrow leaves and good strong clumps, so leaf width is just one way to judge them.
