Ihave two lilac bushes that are 3 years old. They are very healthy. The problem with them is they have not yet flowered. Is there something I can do to promote flowering?
This article will help: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm
I just got a Hiawatha lilac bush and I would like to know how wide it will get. I can't seem to find any information on it. I have another lilac bush and am wondering if there is a way to make it spread a certain way.
The tree ranges from about 6-10 feet tall with a similar spread, making it suiable for use as a hedge, unless you choose to maintain its spreading growth through pruning.
There is no sure way to encourage spreading in a particular manner.
We would like to grow a lilac tree in a very large container. This would frame the back area it would be in. We would make the container ourselves as large as we need. We would like it to grow to a good size. Suggestions on how to do this and possible lilac trees would be appreciated.
You want to make the container about 5"-10" wider than the rootball of the plant you buy and at least 2' deep.
You may like a dwarf Korean lilac. They spread nicely, but stay small so they would not outgrow the container too quickly.
Why doesn't my lilac bush have very many blooms or leaves? It is about 5 years old and is about 6 feet tall and 3 feet around. It gets a lot of sun and is in a clay-based soil.
It is likely a phosphorus deficiency. Fertilize it with a phosphorus rich fertilizer to help it bloom. This article should help as well; https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm
The soil could be a factor too. Try amending your clay soil to see if this improves the issue. This article will help with that: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/how-to-improve-clay-soil.htm
It has become mostly wood. Need it as a backdrop for a waterfall, so I don't want to trim it to 8" as suggested. It would be best at about 5' tall. Will I lose it?
You can do something called rejuvination pruning. It can be done once in awhile without killing the shrub. This article has direction on how to do it at the bottom of the article:
On one of my lilac trees, the leaves are curling and looks like it needs watering; but I watered it when I saw that it was doing this, but that did not help. What can I do to get it looking healthy again?
There are a lot of things that could be affecting the lilac: borers, canker and root rot to name a few. They are generally tough plants and come through just about any adversity. I would try cutting it back. If it survives, it will not bloom next year, but blooms should return the following year.
About four years ago, my husband and daughters bought me a dwarf lavender lilac bush, really small only about two feet tall. When they planted it, the blooms were very traditional lavender in color. It has bloomed every year and has grown considerably and is now about four feet tall and bushy. We moved two years ago and took this bush with us, no effect to its growth or blooms. Last year it bloomed like gangbusters all over. I lightly prune after the blooms go away each year. It gets mostly full sun in its location. One really odd thing. This year it bloomed very lightly, only three blooms due to a late snow, and the blooms are PINK. Carnation pink. No joke. Could this be due to the late snow and next year the blooms will be the usual lavender color, or do they change color due to soil like hydrangeas? I'm baffled.
I have never heard of a lilac changing its color. My best guess is that it was due to the late snow. Now we are both baffled. Hopefully someone else may be able to offer some insight on this.. Please post again next year and let me know what color it blooms !!!