The pods stay on the plant an average of 9 months. They generally pop open just before the rainy season starts (another great trick by Mother Nature), but some break open earlier. The pod will start to look dull and dry out a bit, and there will be a distinct line down the center. When you squeeze it it will 'give' a little more than before. This is the time to keep a careful watch, or cover it so the seeds don't disperse before you're ready for them!