I find they take a good week...they start to show the little root....then that grows and is a good while before the sprout shows up. I find the white root tends to brown a little during that time, but they aren’t moulded or smelly, so I just break the root bit off and feed the sprout and bean together ....goodness knows if that’s right or not, but have been known to be consumed...unless there’s something more tasty around...he’s currently wearing a raspberry beard!