Garden State Bulb Common Lilac Bare Roots come directly from our farms and growers in the US. When planted, Lilacs are a fragrant shrub with lavender flower clusters that will fill your garden with sweet fragrance for weeks! These beauties also grow up to 15 feet tall, making them a perfect focal point or privacy barrier for any entryway or garden! Please note, lilac plants need time to grow before they start flowering. Most plants will start blooming after 2 years, but some may take as long as 3 to 4 years to reach maturity.