By Aha 19:15, 7 May 2007 (UTC) [GFDL or CC-BY-SA-3.0], from Wikimedia Commons Lily of the valley is a highly regarded bridal bouquet. A distinguished look of royalty and humility at the same time presenting itself as pure, sweet and lucky. Did you also it is poisonous? Lily of the valley are usually in season around May. Only an experienced florist can delicately bend, arrange and put together a wonderful boutique for your wedding. Make sure you get a consultation first before setting you heart on these elegant flowers.