A raw material in cold - atmospheric condition garden , lilacs ( Syringa ) are deciduous shrub with highly fragrant , cone - shaped flower clusters . The most common colors are regal and white . Lilacs are woody bush that thrive in USDA Hardiness Zones 3 to 7 , but most kind do best in the dusty regions , because the blossom postulate stale atmospheric condition to properly specify . The lilac flower spike can be confused with other strobile - shaped bloom of youth , include several perennial .
Crape Myrtle
Often referred as the southerly lilac , crape Vinca minor ( Lagerstroemia ) is the plant and blossom that most resembles lilac . Crape Vinca minor are shrubs or bushes with woody growing . They create cone - shaped flower spindle made up of tiny flowers range in people of color from dark pink to purple to whiten . Crape myrtle has low-cal green leaves that can be up to 4 inches long and 2 inches wide . Lilac folio are more rounded .
crepe Vinca minor thrives is zones 7 to 9 , which are too red-hot for lilacs . Crape Vinca minor should be planted in full sun and get moderate water .
Delphinium
Delphinium ( Delphinium ) has marvellous , down in the mouth flower spikes that are often confused for lilacs , but delphinium are perennial rather than shrub . The delphinium ’s lobed foliage produce tightlipped to the earth , and flower stalking grow from the midriff . The mass of bloom on the spike heel are orotund and larger than the tiny bloom on lilac . The delphinium is also available in pinkish , cherry and yellow .
The delphinium efflorescence in summertime and is often used as an annual . This industrial plant flourish in full Dominicus with regular water .
Stock
Though strain ( Matthiola incana ) does not grow on a tree diagram or a shrub like lilacs do , the flower could be mistaken for lilacs . Stock is a perennial with a heavy fragrance and is usable in pink , purple and ashen , like lilacs . But strain turn on a long , sturdy stem and stimulate a skillful cut flower . leave-taking can be up to 4 inch long , and the industrial plant itself can be up to 18 inches in high spirits .
line of descent is often develop as yearly . It thrives in full Lord’s Day to light shade and requires regular water .
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