Summer
The eye leaf grows only in the winter. Every other leaf, however, will do the opposite, which is to grow in the summer.
Just think of the eye leaf as weird (it is weird, after all). It grows in the winter. Now, think of any normal leaves. They do the exact opposite, which is to grow in the summer.
げ, か, が
なつ
None
Now it's summertime! What do you do during the summer? You just sit around with your favorite string tying knots (なつ) in it over and over again.
Think about summer. Now think about yourself tying knots. Now think about summer again. Now think about tying knots again. Now think about your mother getting upset at you because all you do is tie knots all summer long. Go play video games like a normal kid!