Great Blue Lobelia (Lobelia siphilitica). Hardy, North American herbaceous perennial Description: Bright blue flowers in dense clusters, mid to late summer Habit: Flower spikes grow 2-3 feet high Culture: Prefers full sun to part shade and humus rich, moist garden loam; tolerates wet ground Hardiness: Cold hardy to USDA Zone 4 Origin: North America Attributes: Rain garden, Deer resistant, Attracts butterflies and hummingbirds This native wildflower has been grown in American flower gardens since at least... - Great Blue Lobelia (Lobelia siphilitica).
Cardinal Flower (Lobelia cardinalis). Hardy, North American perennial Description: Brilliant scarlet-red flowers in summer to early autumn Habit: Flower spikes grow to 2-4 feet high from evergreen, 12-inch wide basal clumps of dark, glossy green foliage Culture: This sp... - Cardinal Flower (Lobelia cardinalis).
Great Red Hibiscus (Hibiscus coccineus). Hardy, herbaceous North American perennial Description: Large, bright scarlet blossoms open from upper branches in late summer; leaves turn orange and yellow in fall Habit: Grows to 7 feet high and 4 feet wide; multi-stemmed Culture: Pre... - Great Red Hibiscus (Hibiscus coccineus).
Blue Star (Amsonia tabernaemontana). Hardy, late-spring flowering perennialDescription: Clusters of pale blue flowers borne on 3-foot stems; dark green, peach-leaf foliage turns yellow in the fallHabit: Grows up to 3 ft high and wide, vase-shaped Culture: Prefers full ... - Blue Star (Amsonia tabernaemontana).
Delft Blue Hyacinth (Hyacinthus orientalis cv.). Early to mid-spring-flowering, hardy, pest-resistant bulbDescription: Large, single-flowered, highly-scented flowers in soft lilac-blueHabit: Flower height 8 to 12 inchesCulture: Plant bulbs 5 to 6 inches deep in well-prepare... - Delft Blue Hyacinth (Hyacinthus orientalis cv.).
Harlequin Blue Flag (Iris versicolor). Hardy, North American, spring-blooming perennialDescription: Showy, bluish-purple, wide-spreading flowers in branched clusters of two or three; falls are often blotched in yellow or purple-veinedHabit: Forms vigorous clumps of... - Harlequin Blue Flag (Iris versicolor).
Blue False Indigo (Baptisia australis). Herbaceous, spring-flowering perennial Description: Deep indigo blue, pea-like flowers in clusters above shrubby plants with bright blue-green foliage Habit: Grows 3 to 4' feet high Culture: Prefers part shade to full sun and moist but w... - Blue False Indigo (Baptisia australis).