| | BOTANICAL NAME, CULTIVAR | (COMMON NAME) |
| | YEAR | RATING | MASTER GARDENER OBSERVATIONS AND COMMENTS | HEIGHT | WIDTH |
| | Stachytarpheta jamaicensis 'Pink' | (Porterweed) |
| | 1996 | 4 | Planted in full bloom in August 1996, stayed in bloom with pink flowers on spikes. Bloomed | 19 | 33 |
| | through October then started to decline. |
| | Stokesia laevis 'Klaus Jelitto' | (Stoke's Aster) |
| | 1995 | 0 | Purple blooms in May and early June, plant declined in the summer and was in poor condition the | 22 | 24 |
| | rest of the season, rated a flat zero. |
| | Tagetes lucida | (Texas Tarragon) |
| | 1995 | 4 | Small yellow blooms in October and November, nice green vertical clump. | 38 | 36 |
| | 1995 | 4.8 | Intense long lasting yellow blooms from mid-Oct. to Nov. Some problems with stem breakage | 23 | 43 |
| | early in season, but low maintenance requirements. Fragrant tarragon substitute. |
| | Tagetes signet 'Gnome' | (Marigold) |
| | 1995 | 3.6 | Yellow-gold blooms from March to May, but plant declined rapidly and died within two months of | 11 | 9 |
| | being planted out. |
| | Tagetes signet 'Lulu' | (Marigold) |
| | 1995 | 6 | Newly planted in September, prolific yellow blooms from planting data to November. | 8 | 16 |
| | Tagetes signet 'Tangerine Gem' | (Marigold) |
| | 1995 | 6 | Newly planted in September, prolific orange blooms from planting data to November. | 8 | 16 |
| | Thermopsis caroliniana | (false lupine) |
| | 1997 | 0 | Declined after first month, no blooms. | 29 | 25 |
| | Thunbergia grandiflora |
| | 1995 | 5 | Vine of large lavender trumpet flowers, bloomed heavilly from August to mid-October, plant | 96 |
| | considered attractive but requires a large area. |
| | Thymus vulgaris | (English Thyme) |
| | 1995 | 1 | Very weak growth, dead by August. | 5 | 7 |
| | Tibouchina semidecondra 'Athens Blue' |
| | 1995 | 5 | Purple blooms in mid summer, pretty foliage, recommended. | 48 | 54 |
| | 1996 | 3 | Never bloomed, bright green erect foliage added texture to landscape. Some problems with inch | 15.5 | 14.5 |
| | worms. |
| | Trachelospermum spp. | (Arabian Jasmine) |
| | 1996 | 5 | Delicate white blossoms continued from June through October. Deep green plant seems hardy | 30 | 25 |
| | and would do better if not shaded and dwarfed by other plants. |
| | Tricyrtis x amethystima | (Toad Lily) |
| | 1995 | 4 | Purple and white speckled flowers bloomed in late October through November, foliage attractive | 26 | 32 |
| | dark stalks contrasting with lighter leaves, but not remarkable. |
| | 1996 | 5 | Vigorous healthy growth, beautiful purple blooms from mid October through November. | 29 | 60 |
| | Interesting plant with pretty leaves. |
| | Turnera ulmifolia | (Buttercup) |
| | 1996 | 6 | Yellow flowers from summer thru fall, beautiful large healthy plant with wonderful color. | 36 | 60 |
| | Turnera ulmifolia 'Buttercup' |
| | 1997 | 5 | Bloomed with 3 inch butter yellow hibiscus-like flowers from June to November. Leggy, | 45 | 56 |
| | sprawling but healthy. |
| | Verbena hybrid 'Homestead Red' |
| | 1995 | 5 | Planted in March, spectacular bright red blooms from April thru July, fast growing and healthy | 15 | 64 |
| | until late summer. |
| | PAGE | 20 |