I've been culling okra plants/varieties as the weather turns colder. Some for slow growth all season. Some because the leaves are dying even though it isn't freezing yet. I noticed that most of the plants that are remaining, and that have thrived in my garden have frilly leaves like this:
Frilly-Leaved Okra.
Plants with fat, non-frilly leaves have tended to do poorly for me.
Fat-leaved okra.