Keep any fall-planted perennials well watered until the ground freezes to encourage.
Sep 17, Autumn crocus does best in full sun to part shade and grows 7 to 12 inches tall. Plant these crocus bulbs in mid to late summer, tucking them among hardy geraniums, creeping thyme, ajuga or hardy vinca - plants that can help hide the dying leaves in early summer.
Hardy in Zones Aug 21, Pansies, just like mums, are cool-season bloomers. Although you can plant them in the spring, you get a better bloom if you plant them in late summer to early fall. If.