How do you tell when green apples getting ripe?

[SwampCat]

My Granny Smith. How do I tell when getting ripe?

 

[4wanderingeyes]

Cut one open, check for brown seeds.

 

[Barndog56]

They should develop some blush on the sunny side, and will have lenticels too.

 

[Prof.Kent]

Bite one.

 

[Turkey Creek]

A good indication can be brown seeds and background color of the apple is different than the sun exposed side. Scientifically a starch Iodine test on the flesh to see how much sugar has been converted.

 

[Prof.Kent]

I prefer eating one to iodine testing!

 

[Turkey Creek]

To be honest their ripe when you like them! As an example I enjoy Liberty apples well before they are "ripe" all the way through their peak. Same for Arkansas Black.