They start to get soft, and change colors a bit.
Around here, they get a little purple hue to them just before popping open.
In the picture below, there is only one “primo” pod, and one getting close to ready. All the rest are definitely early. But, I wasn’t going to be able to pick for at least a few more weeks. I figured getting less silk out of bunches and bunches of pods was better than HOPING they were still around when I got the chance to harvest them
................................................................................All climbing methods, platforms, saddle designs, and/or use of materials possibly mentioned in the post above are not peer reviewed for safety, and should only be used as an example of my own method. Do your own research and testing before becoming confident in any DIY solution to support your life.
-IkemanTx