Like all citrus fruits, grapefruits do not ripen or become sweeter once they are harvested so it is important that you know what to look for when selecting grapefruits from the grocers. … If the grapefruit gives a little and bounces back to its normal shape when you release the pressure then you have found a ripe one.

How do you ripen a grapefruit?

It should feel plump and heavy, as if it’s about to burst with sweet grapefruit juice. In general, ripe citrus will have smooth, thin skin. Give the grapefruit a nice squeeze to see if it’s firm. Firm all the way around is a good sign.

Should I pick my grapefruit before a freeze?

Watch the weather, pick any ripe fruit before a potential freeze, and always remove fruit before it becomes overripe and falls of its own accord.