Gardening Questions And Answers
Since lilacs prefer good drainage, planting lilac bushes in slightly elevated areas is recommended whenever possible. Following planting lilac bushes, water them thoroughly and add a layer of loose mulch. Keep the mulch thick enough to keep out weeds and retain some moisture but light enough not to hold too much.
Lilacs produce seeds in seed heads. The lilac bushes do not bloom immediately after they are established. It usually takes at least three years before you get blooms on your lilacs. Once your lilac bush starts flowering, your plant will start producing lilac seed pods that, in turn, start growing lilac seeds.
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 […]
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 sap from the leaves, stems and roots of the plant.
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 off many or all of next year’s flowers.
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 help set next season’s blooms.
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 off at or just below soil level.
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 2 feet out from the trunk of your lilac.
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 margins and begin to die.