On lilacs, as on many plants, powdery mildew is mainly a disease of senescence, that is, of aging. It mainly attacks the leaves towards the end of their useful period (end of August and September). That’s why it doesn’t really harm the shrub: by then, your lilac has already stored up its energy reserves for next year.
Powdery mildew is seldom serious, causing more of an aesthetic problem than harm to lilac plants. As with many diseases, the best way to control powdery mildew is to prevent its occurrence. Because the disease is seldom serious, chemical control measures are not usually warranted.
Lilacs are hardy, easy to grow, and low maintenance. They can grow from 5 to 15 feet tall, depending on the variety. The fragrant flowers are good for cutting and attractive to butterflies.
Lilacs are free of poisons from the tips of their branches to the ends of their roots. In fact, the flowers of the lilac are actually edible. If you have heard that lilacs are poisonous, you have mistaken the bush for a plant called Persian Read more
Some highly fragrant flowers that do not aggravate allergies can still be irritants with their potent scents. In close quarters, they may be best enjoyed outdoors and not brought inside. These include gardenia, hyacinth, jasmine, and lilacs.
It's wise to deadhead your lilac once it's finished blooming for the season. With a clean, good quality pair of pruners, cut the spent blooms off.
Lilac, syringa, is a garden classic, flowering in late spring. Its pale purple, pink or white flowers are excellent for cutting and work well in bouquets. Lilacs can be grown as a shrub or small tree, so work well in many garden situations, both in Read more
When to Trim Lilac Bushes The best time for pruning lilac bushes is right after their flowering has ceased. This allows new shoots plenty of time to develop the next season of blooms. Pruning lilacs too late can kill young developing buds.
Without enough sunlight, the plant often will not bloom. Lilac bushes prefer full sun. Sometimes a late freeze can knock the flowers or the start of the flowers right off the bush. If your lilac bush is not blooming, you might want to think back Read more
The adult form of this pest is the clearwing moth, which is similar to a wasp. Lilac damage is produced primarily by lilac borer larvae, which feeds on the sapwood of the plant. Scale insects are another lilac pest, which damage lilacs by sucking the Read more
As a general rule for all lilacs, they should be pruned immediately after they're done flowering in the spring. Since lilacs set next year's flower buds right after the current year's flowers have faded, pruning later in the summer or fall will result in cutting Read more
Trim the plant annually, right after it finishes blooming, to improve vigor. Remove weak branches until you have a clump of seven to 10 stems of varying ages. Thin out top growth to let sunlight into the center of the lilac. New buds will form Read more
Lilacs originated in Eastern Europe and Asia and were brought over to America by colonists in the 17th century. Although they weren't native to the United States, they quickly became popular with Americans.
Space medium-sized lilacs that are 6 to 8 feet tall at maturity 2 to 4 feet apart. For larger lilacs, which will be taller than 8 feet at maturity, plant about 4 to 6 feet apart. Once the plants mature, larger lilac plants can spread Read more
Lilacs are hardy shrubs, meaning that they need very little care to survive. They can withstand temperatures of -40 degrees Fahrenheit (-40 C) but may need some protection from icy winds that damage the flower buds. To help flower production, lilacs need cold winters to Read more
Lilacs should be pruned yearly to develop a good framework of stems and promote vigorous growth that enhances flowering. Removing stems may be done immediately after flowering, or, if you don't mind sacrificing a few blossoms, in late winter. Shoots and stems should be cut Read more
Too much water can diminish the oxygen in the soil by filling in air pockets with water, which chokes the roots of the lilac. Witling of the plant is the first sign that the lilac is overwatered.
The new shoots will grow over the summer, set flower buds, and be topped off with a flower cluster the following spring. While not as important as the yearly thinning, removing the old blossoms allows more of the plant's energy to be directed into growing Read more
Lilacs require full sunlight to flower properly. They must be planted where they will get six hours of light per day. Also, they do not appreciate being planted near other trees, which could hinder their development.
With its flower power and extended bloom time, 'Lilac Falls' is one perennial growers, landscapers and gardeners will surely fall in love with.
Lilac plants have been popular for many generations and are still a staple for many yards and garden areas. Lilacs do not contain any chemicals or toxins that will poison humans or animals and they do not irritate the skin.
Growing a lilac bush in a pot is a possibility. When selecting a lilac variety for a decorative pot, look for a dwarf variety such as our Bloomerang® Dwarf Purple Lilac. Ideal placement for potted lilacs can be balconies, rooftop patios, decks, and very small Read more
Grass clippings and coffee grounds can be used as a good source of nitrogen. Use sparingly, as too much nitrogen in the soil will result in poor blooms. Lilacs grow best in slightly alkaline (6.5 to 7.0 pH), moist, well-drained soil. Adding bone meal to Read more
Lastly, lilacs do not like overly acidic soil. One trick to encouraging them to bloom is fertilizing them with Epsom salts during the dormant period. Epsom salts are a good natural fertilizer for lilacs and tomatoes. Add about one cup of Epsom salts to the Read more
During its dormant time, the lilac bush can look dead with its scraggly branches. However, there are a few things you can do to make sure it is alive. Scratch the surface of the lilac bush's bark with a pocketknife. If you see green beneath Read more
The most common causes of yellowing leaves on ornamental trees and shrubs such as lilac are overwatering or poorly draining soils and an iron deficiency called iron chlorosis. Overwatering results in yellowing, then browning leaves and leaf drop. Dig down 12 inches in the soil Read more
Common Diseases of Lilacs Be on the lookout for these diseases: Bacterial blight – The bacteria Pseudomonas syringae causes early shoot and branch dieback, distorted leaves, and leaf spots that start out olive green but soon develop water-soaked areas. Those spots turn brown with yellow Read more
Winterizing Lilac Shrubs They can withstand temperatures of -40 degrees Fahrenheit (-40 C) but may need some protection from icy winds that damage the flower buds. They need well-draining soil to prevent frozen water from damaging their roots and killing the tree.
Lilacs are pollinated through both biotic and abiotic means. Lilacs can be self-pollinated when the plant contains both male and female flowers. If it is near another lilac bush, then it also can be cross-pollinated, which means the pollen sac from one plant lands on Read more
Specialized fertilizer for lilacs can help your plant produce healthy blooms. Especially if the soil is low in fertility, it's a good idea to mix in cow manure or a fertilizer low in nitrogen and high in phosphorous to promote flowering.
Exit holes are approximately 1/4 inch in length and are most common on the lower portion of the plant. These holes are often filled with frass, which is a combination of excrement and sawdust. Lilacs with heavy infestations of the lilac borer wilt, turn brown Read more
It is caused by two fungi: Verticillium dahliae and Verticillium albo-atrum. Individual branches turn brown and die suddenly due to the fungi blocking the vascular system of the branch, cutting off water and nutrient movement. Increase watering and fertilizing to extend the life of the Read more
Powdery mildew on lilacs is usually only an aesthetic issue. Powdery mildew overwinters in plant debris. If you notice powdery mildew on the foliage of your lilacs, thoroughly rake up the leaves as they fall and dispose of them to help reduce infection next summer.
Lilacs grow best in slightly alkaline (6.5 to 7.0 pH), moist, well-drained soil high in organic matter, so do a soil test before planting. If the pH is below 5.5, you'll need to add lime to increase it. Once you've achieved the right pH, it's Read more
Lilacs do not contain any chemicals that will poison animals or humans, nor do they irritate the skin. Even though lilac stems, leaves, and flowers pose no health threat to dogs, it is a good idea to keep your dog from chewing on the plant.
Carpenter ants and yellow jackets (wasps) are attracted to the lilac bush because of its sap and the honeydew, which is excreted by aphids.
In the past, lilac was ingested to rid the intestines of parasitic worms, and was also used in the treatment of malaria. In the 19th century, lilac was used by doctors to treat fevers. Some modern herbalists use the essential oil of lilac to treat Read more
Lilac produces nectar, pollen and essential blossoms for bee pollinators. The flowers tends to blossom in the spring through to summer and entice bees with their brightly-coloured petals.
Lilacs require full sunlight to flower properly. They must be planted where they will get six hours of light per day. They do not like to have wet roots, so you need to plant them in a place where the soil drains well.