They are ripe when they are soft to the touch, and come off easily in your hand. Depending on the variety, the may change color to yellow, red or pink.

I imagine you could safely eat them, but it's probably not going to be any good, unless you have a dragon fruit or pitaya. If it's a nice flower, better to plant the seeds than eat them!

Thanks! :o) They are STILL green... and definately NOT pitaya, NOR Pitahaya... Which I am trying to grow.