Natural Lilac | California Native / Borderline Xeric | 30+ Plants & Basic Layout PlanABOUT Ensure your soil has adequate drainage (or on a rocky slope) and you can go nearly xeric with this one! One of our lowest water plant packs. Soothe the senses in this cool ceanothus serenade. Simulate expanses of wild California lilac's raw, natural beauty. For a few months in late winter and early spring these purple, white and blue blossoms cluster like misty little clouds over the dark green glossy foliage that predominates the rest of the