I rather suspect its because Summer would have nowhere to grow inside me. I already have most of those powers on my own, my natural fire would just consume it. Which isn't productive for a world trying to encourage growth of its own elemental magic.

So...it went to a fairly close elemental affinity. [And he has some FEELINGS about having powers like his mother.]

[He make be acting a little too meticulous in straightening out the papers in his hands. Obsessive straightening to just kind of get out some anxious energy.]

I'll also need to introduce you to the guard plants outside. Those ones are little more teachable.