I don't think growth happens by default. I think positive growth is a conscious choice. You don't grow by default as you grow older. I know people older than me who've stopped growing since before they were my age.
You don't grow just by being thrown into new situations. I was in the army for two and a half years, and I saw people who were the same the day they left as the day before they enlisted.
I think you make a conscious choice to grow, based on three main decisions: what you focus on, what you decide it means, and what to do about it.
So please, choose well my friend.