What flowering plants last the longest?
While many perennial flowers have long bloom times, the threadleaf coreopsis Moonbeam variety (Coreopsis verticillata ‘Moonbeam’) is a perennial with the longest bloom time. Moonbeam blooms early in the summer and will continue to do so until the end of the fall. Butterfly bush have one of the longest bloom times of all garden plants: they seem to never be without flowers from early summer through autumn. This makes them perhaps better called “continuous bloomers” over rebloomers, since they don’t really take a break like other plants on this list do.Garden experts agree that calendula is the undisputed champion of fast-growing flowers. Germination occurs just five to 10 days after planting, and blooms appear within six to eight weeks. These flowers make excellent additions to vegetable gardens since they attract pollinators and beneficial insects.Annuals aren’t known for their long bloom periods, but these six flowers will bloom all season long. Rudbeckia, zinnias, cosmos, calendula, salvia, and dianthus (carnation) are some of the best. Many of these options are also low-maintenance, pollinator-friendly, and native species.