Great Blue Lobelia
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- Hardy Planting Zones- 4-9 Sun or Shade – Sun and Part Shade Mature Height - 24-36" Mature Width- 12-16" Bloom Season – Summer (July to September) Gardener Status- Beginner Soil Type- Loam/Sand/Clay.
Great Blue Lobelia - Lobelia Siphilitica
The bright blue stalks of the great blue lobelia grow between 12-18" in zone 3-9 from summer to early fall. The plant is hardy and known to bloom straight through the frost. They thrive in partial or full-shade and in loamy, well-drained soils. The spiked colony of flowers attract hummingbirds and bumble bees. The trees are great for gardens or even patio pots.
Also known as Lobelia siphilitica or Blue Cardinal Flower is a plant that blooms pale purple-bluish flowers with tiny white streaks accenting the blossom. This plant is Native to the Eastern United States area and is from the Campanulaceae family. The category of plants it is a member of is called the Herbaceous perennial group. Lobelia siphilitica prefers dark, rich and moist soils. For full sun, a Northern cooler climate works best to balance the plant's temperature requirements. If growing with a Central Coast or Southern Climate, part shade is ideal for health. This plant requires consistent watering- moisture should always be present. In its native environment, Blue Lobelia grow alongside streams and swamps; this serves as an indication of how much moisture it requires. The bloom time of this plant occurs between July and September- perfect for beginning gardeners; the maintenance level is low for this species. Identifying the blooms by looking for dark tubular flowers with three lobes. The scientific name of this species pays tribute to Matthias de l’Obel, a French Botanist. This plant is not known to be susceptible to chronic insect or disease afflictions. It is capable of withstanding pest invasions as well as deer, although snails and slugs have been known to take a bite occasionally. Typical uses for this plant include wild gardens or anywhere near running water or large pools of water. It is known for having the ability to self-seed, attracts bees and hummingbirds, and is extremely sensitive to drought. It is commercially available and has a collection date in the Northern US starting in autumn.