All of last year's lilac blooms are visible and dried out. I did not prune out the blooms last year, but I did the previous year. I do have new growth and some flowers coming through. Is it too late to prune the old flowers from the bush? When should I do this?
You can cut the old blooms off now. It won't hurt to let them stay, but they are unsightly.
When is the best time to dig up a new shoot from a Lilac bush? I have several growing under my lilac bush. I would really like to reset some of them.
Spring is an excellent time to transplant the lilac shoots.
Can I get starts from flowering bushes, such as lilac bushes, and if so, how?
Yes, you can. These articles should help: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-care-growing-and-planting-lilac-bush-plants.htm
My bush is spreading but only leafy growth. The bush is 3 years old.
There could be an abundance of nitrogen in the soil, which would result in lots of green foliage and little blooms. Adding phosphorus (bone meal) to the soil will help boost blooming. This article should also help: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm
I have a lilac bush (wild one that I dug out of a neighbor's yard) that I transplanted three years ago. It has a lot of offshoots coming from the bottom. I had to put chicken wire around it because the rabbits thought they were delicious. This year it has about three buds on it. Should it be pruned and the shoots cut off. And if so, when?
This article will help you:
At what point below the lilac flower should you cut the stem to take a bouquet into the house?
This really depends on the size of the vase/container you'll be placing them in. I would get at least 6-8 inches. Make angled cuts, take them in early morning, and opt for flowers with about three-fourths of the buds open.
I have a lilac bush that has been at my home for over eight years. The last three springs in a row, right before the buds burst open and flower, they turn brown and so do the leaves, wilting like the tree has died. I see no bugs on it. I am so upset after three years. What is it, and what do I do? I live in Washington state.
Your tree may simply be in need of some trimming. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm