YA Girl learns magic and talks to a tree

In the 90's or early 2000's I read a fictional book in my school's book fair about a girl who learns that magic exists and that's about all I remember from the plot, but i do remember specific things that happened.

One part of the book she is sitting under a tree in her backyard looking up through the leaves and after staring for a while notices the patterns in the leaves are actually the tree talking to her. The book uses magic in a very mathematical and patterned way. She draws circles and learns a bunch of technical stuff to practice spells, but the thing i remember very clearly was her talking to her tree in the backyard just by looking at the leaves.

I think it was a young adult novel considering it was either elementary or middle school that i found it.

So You Want To Be A Wizard by Dine Duane. https://en.wikipedia.org/wiki/So_You_Want_to_Be_a_Wizard

I second this. Love that series.

Even if that's not it, that series is great. I didn't discover it until I was an adult and I still love it. (And there are ten books now!)

Yes thats it!!!! thank you so much and omg 10 books im excited to read them!

touchstone

So You Want to Be a Wizard by Diane Duane

You remind me that I need to get back to the series. I first discovered it more or less as it was being written and I lived in New York, so I could identify landmarks, especially in the first two books. But then I lost track as she wrote more. I have all 10 now on my Kindle and am re-reading them slowly.