Plants Bonsai Succulents SILK TREES Harvesting Marigold Seeds: Essential Tips for Gardeners The best annual flowers aren't really annuals. They bloom, drop seed, and come back the following spring without being replanted not because the plant survives winter, but because the seeds do. Lilies are a must have bulb for me. Starting with the Asiatic lilies, you can have an extended two month period of bloom. My favorites are the Martagons and fragrant Orientals. But