These taller perennials usually remain in the 3 to 4 feet high range under most conditions. Use them behind and among low to medium height growing perennials, as specimen plants, near the middle to the back of border, in front of medium and large shrubs and very tall perennials, and around larger tree form plants. Some of these will make nice container specimens and when used in combinations for large and very large containers. Growing conditions may affect the plant's ultimate size. This list may also include some tropicals that are grown as die-back perennials in zone 8B so just keep that in mind if you are in a colder climate.
Spikes of 1/2" long, tubular, two-lipped, deep azure blue flowers have a contrasting bright white bee-guide and throat are produced in late spring or early summer and continue into fall atop the tall wispy stems. The nectar rich flowers attract bees, butterflies, and hummingbirds. Bog Sage, Salvia uliginosa, is a rhizomatous, herbaceous perennial producing a multitude of tall thin wiry stems that can reach 5-6' high in rich fertile moist soils but tends to remain shorter, 3-4' high or so, under average moist garden conditions, which it can tolerate quite well, despite its name, once fully established. it tends to be more restrained under drier conditions as well. Its long flowering season and ease of care have garnered Bog Sage the RHS Award of Garden Merit. It can tolerate full sun in the cooler portions of its range but may be at its best where it receives a little midday shade in areas with hot summer climates. Item# 12906