Sure. You can out-grow a planet, a universe, even a multiverse. But what happens when you start to fill up... A computer? It seems as spring continues to grow, your screen can't show anything else. He takes up more and more of your screen, soon starting to grow cramped in the small space left. Not even the endless digital world behind your monitor could hold him now as a crack started to show on it. And another. And another. Until eventually your monitor shatters, sending Spring's face to shoot through and knock you down to the ground. Spring apologizes, climbing out of the monitor. Already he was bigger than you and still growing.
This would start another journey of growth. You could tell. Nothing will stop spring from growing even bigger.