Some gardens may look spent at the end of a long, hot summer, but with good landscape planning, the shorter days may be the beginning of fresh color. A native that begins its show of scarlet flowers in late August and continues through September and into October is California fuchsia, Epilobium (previously classified botanically as Zauschneria). Because of the many species and cultivars available, it’s possible to add bright deer-resistant color for weeks. The taller cultivars have strong, erect stems with multiple flowers opening in succession. In fullest bloom, it is a blaze of scarlet flowers, all the more vibrant …