At this time of year, most blooming plants have finished their show and are just enduring the heat until the rains come. Buddleia, phygelius, fuchsia, echinacea, and cistus still offer a few blooms, thank goodness, but late summer / early fall is not when they shine. Here are 7 of my favorite plants that bloom in late August or early September in my garden. Silk Tree Albizia julibrissin, or Silk Tree (above photo), is an elegant, feathery tree that has a broad canopy and delicate, divided leaves. In August, fan-like,…