Bird of paradise plant

Question

Container grown outside in south of France. During the summer I noticed the green leaves wilting, the base of the stems brown. I have 3 main shoot sections, now the second is going the same way with 6 leaves. It’s winter now so I surround the the whole pot with straw protection, which seemed fine last winter. Too big to move.

Answer 1

Is the plant staying too wet? If not, it sounds like a pathogen problem. That would necessitate a soil and root sample test, performed in a lab.