Pentstemon, many colours; three feet; August and September.
Phlox, all colours; two to four feet; early July until killed by frost, if the heads are cut as soon as finished flowering.
Platycodon Mariesi, blue; one and one-half feet; August.
Rocket (Hesperis Matronalis), white and purple; two feet; May.
Rudbeckia (Golden Glow), yellow; five to eight feet; middle of July to September first; second crop in October.
Tritoma (Red-hot Poker Plant), orange-scarlet; three to four feet; September and October until killed by frost.
Valerian, white; three feet; May and June.
Veronica longifolia, blue; two feet; August.
Yucca filamentosa, white; three to five feet; second and third weeks in July.