When are plums ripe?

Question

I just found out I have two plum trees in my back yard. They are tiny thin plums, not like any I've seen at the store and they taste alright, but could probably use a little bit more time to be super delicious. They are falling off the tree, but how will I know when they are ripe ripe?

Answer 1

when they start to emit a bit of sap they are perfect, but you can pick them when they turn dark purple (or plum.)