Maintaining a very old Lilac
Hi! I have a very old lilac (possibly a group of lilacs); we bought the property about 2007 and it was in total neglect for probably 30 years before that. So the lilacs are at least 40 years old, but I think even older than that. The family that lived here in the 1940's did a lot of improving and I think this is one of theirs.
They haven't been great bloomers ever, but last year was terrible- I hear it was just a bad year for them in general. We pruned lightly after the 'bloom', mostly to simply contain it a bit better, which end up being almost all suckers and very little out of the bases. This year is the best bloom I've seen from her, but it's still a small percentage of her overall size. I just want to make sure I am doing right by this plant and helping bloom its best.
She's probably about 15-17 ft tall. She gets full sun all day. Here are my immediate questions:
A) Prune this year again? The suckers and up to 1/3 of the base growth, immediately after bloom ends?
B) There are some branches not producing any green at all- it's ok to take these out, right?
C) Can I pot some of the suckers up for sharing and adding to other places in my yard?
D) Any guesses to variety? It's fragrant and the bloom bunches are about 4-6 inches in total length.