I started these from seed three years ago. This year they've flowered. The seeds were mislabeled as something else and I was super surprised when they turned out to be lilacs! They are, aren't they?
I don't see how this is possible. I started other lilac seeds five years ago and they're a lot bigger, get full sun and haven't flowered yet! I bought lilacs that were older than five years and they haven't flowered yet either.
I only have one other lilac that I bought that's like seven years old and it only flowered for the first time last year. And it only had one flower cluster this year.
This surprise lilac has two clusters.