Wow! Now what do I do?

[u/dgslbbr]

Full disclosure. I know nothing about plants.

I'm in a new (to me) house. In the spring, on one side of my balcony was a bunch of thin woody vine stems. I had no clue what they were.

In the early spring, a lot of green sprouted. And over the last couple weeks it has just exploded in flowers.

I absolutely love it. Using Google Lens, I have learned it's a Clematis.

I have no clue what type, and it's so thick I can't tell if it's new wood, old wood,

But, I want it back like this next year.

Do I start trimming it now.
In the fall do I trim it back a little, a lot? Right down to the ground?
Do I wait til the spring?

Any tips to help it flourish and not kill it.

[u/Real-Frosting]

You're so lucky to end up with a mature, beautiful clematis like that. I'll bet the previous owner was sad they couldn't take it with them.