Lilacs are one of the most beautiful flowers. They have been cultivated since ancient times. There are many varieties of lilacs, but they all share some common characteristics:
They grow from a single stem with no branching or twining; they don’t require much care; and their color ranges from pale pink to deep purple.
The best time to plant them is in spring when they need little attention and produce their first blooms before summer arrives.
If planted too early, they will not flower until late summer or fall. If planted too late, they may not bloom at all.
In zones 7 through 9, lilacs are usually grown in pots because they prefer cool temperatures and full sun. However, if your soil is sandy or loose in texture (loose clay), then you might want to try growing them in containers instead. Lilacs do well in any kind of potting mix except those made from peat moss.
Growing lilacs in zone 9 gardens requires special care. The plants require lots of light and water, but they also need a good amount of fertilizer. You must provide plenty of shade during the day so that the leaves don’t get scorched by direct sunlight. A sunny window is fine for planting, but make sure it doesn’t get too hot or too cold because lilacs like cool temperatures and full sun. Also keep the temperature between 70°F and 80°F year round.
Make sure soil is well drained. If you live in a very cold climate, plant your pots in the ground instead of on the patio or deck. Lilacs grow best in sandy soil or loose, humus-enriched clay. They also need at least one meter of space around them, otherwise their roots will not grow properly. Make sure that air can circulate freely as well.
Lilacs need a good fertilizer every two weeks to produce buds. You can use a general-purpose 20-20-20 fertilizer during the growing season (March through October) and a slow-release fertilizer during winter. In addition, the soil should be kept evenly moist and not soggy.
You can also plant your pots in the ground if you live in a warmer climate provided you do not experience hard freezes. If your area gets below 30°F, just move the pots indoors for the winter. Many gardeners like to plant a few pots outside and keep the rest inside for year-round blooming.
If planted in the ground, make sure you provide one meter of space around each plant so that air can circulate freely around them. They need this to prevent disease problems.
Sources & references used in this article:
Wyman’s gardening encyclopedia by J Hersey – 1974 – Scribner
A Garden for Life: The Natural Approach to Designing, Planting, and Maintaining a North Temperate Garden by D Wyman – 1986 – books.google.com
Prospects for growing Russian lilac cultivars (Syringa vulgaris L.) in Finland by BYM – 1954 – JSTOR
Monet’s Passion: Ideas, Inspiration and Insights from the Painter’s Gardens by JL Fiala – 2008 – Timber Press
Phytosanitary condition of common lilacs (Syringa vulgaris) in botanical garden of Vilnius University. by D Beresford-Kroeger – 2004 – books.google.com