Harvest:
Harvest okra when the pods are 1 to 4 inches long. Pods should be soft, and the seed should be only half-grown. The more you pick okra, the more you’ll get. When picked often, okra will keep producing until the first frost.

For more information on growing Okra, check out this great guide from Harvest To Table:
https://harvesttotable.com/how_to_grow_okra/