Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/edible/vegetables/okra/planting-okra.htm
When the weather has gotten to where it stays warm all day and ground temp is above 60 degrees. Okra loves hot weather.
We plant ours around mid May-early June. We are in zone 7B.