When will you be ripe?

"When will you be ripe? I bet you are tasty." My father keeps looking at a tropical fruit(Rambutan) tree and talking to himself lately.

"But dad! That tree grows in the region of our neighbour's backyard!" I said to him at the first time overheard his words.

"Yeah I know. I just can't help imagine their taste when looking at them."

"......" I know it is about time to buy him rambutan.