At what age does the penis stop growing.?

Question

On average, what age does the penis stop growing?

Answer 1

"...The penis continues to grow until about 18 years of age, reaching an average adult size of about 7-14 cm."

18 years is only the average so some may grow after that.

Answer 2

I woudl have to say about 18, but remember gravity has it's own mean little trick so maybe never. Keep it tight.