Syringa Vulgaris

Hardiness zones 3-7, (-15ºC/5ºF, -37ºC/-35ºF) in Winter. Adptable to a wide range of soils. Lilacs prefer well-drained, slightly alkaline soil and plenty of sunshine for optimum growth and blooming. Although Lilacs love water, they don't enjoy soggy soil. Without proper drainage, Lilacs will do little growing and produce fewer blossoms. Germination For faster germination, soak the seeds in slightly hot water for 24-48 hours, followed by one month of cold stratification before sowing at 1/4" deep in sterile gardening soil. Keep damp soil, not soaking wet. Keep pot in warm situation 68-75ºF. Germination usually occurs in 2-4 weeks. It can be a lot more depending on their degree of unbroken dormancy, don't give up. Cold stratification This will break their dormancy. It creates a cold and moist environment for the seeds. Mixed in seeds with slightly moistened vermiculite or peat, only damp in a ziplock bag. Close zip bag shut and store it in the salad crisper compartment of your refrigerator. If any seeds begin to sprout during the cold stratification, simply remove the seed and plant.