I've never done it by timer, but a quick search indicates about 90 minutes should be good. I'm always pressed for time and just let it soak while I set up camp, so its usually a little crunchy still when I'm done.
What are we calling 'edible'? I soak rice a minimum of 30m before cooking, I've definitely ended up leaving it longer than 90m on several occasions, I wouldn't just eat it without cooking as a result.
OJFord|3 years ago