A very eminent scholar, retired from my department and now teaching at UCLA, was in my office just now and was complimenting me on my natural talent for writing. It could be that some part of my talent, such as it is, is innate, but I think I learned to be a good writer of prose by carefully looking at the way in which poetry is put together. The language of poetry is visible, foregrounded. Once I could see that with a finely tuned perception, then I could transfer that ability to see language to prose, perceiving the language of prose (normally in the background) in its sharp contours. Then I could choose models that embodied the particular virtues I wanted to emulate.
Of course, some people can read poetry, and even learn to perceive its language accurately, and still write badly. There is, perhaps, a natural talent in figuring out how to acquire a learned talent. Prose, however, is very rarely a natural gift. It is just too artificial a thing.