Quite an architectural plant which adds vertical interest to the landscape! Lobelia seeds can be sown from January to April to give you a summer display. Add in rock gardens, butterfly gardens, or in a deer-resistant landscaping design. This plant's genus name of Lobelia honors Flemish botanist Mathias de Lobel, who studied medicinal uses for plants. Join us as we look at at one of the "great" native plants of … I've owned 2 homes, both of which had shady yards so I've become rather knowledgeable about shade gardening. Season of Interest: Late (July - frost) Main Color: Blue. Remove the leaves from the bottom of the cuttings and dip the cut ends into rooting hormone. Not only do many varieties have true blue flowers, a rarity in the garden world, many also love cool weather and are in full splendor during spring and fall. * Required | We will never sell or distribute your email to any other parties or organizations. Lobelia seeds can be sown directly in the garden or indoors for later transplanting. After the cuttings have developed roots, you can set them outside in your garden, 8 to 12 inches apart, so that they will be able to grow their rosette of leaves before winter. Lobelia species are available in different varieties. Great Blue Lobelia plants stay healthier if they are divided every 2 to 3 years. Generally growing 2-3 ft. tall (60-90 cm) and spreading 12-18 in. It is hardy in zones 4 through 8. This best seller blooms all season and requires little to no maintenance. Surface sow the seed. Also try: 'Albaâ, a cultivar with white flower spikes, and âBlue Selectionâ, a slightly stouter plant with brighter blue flowers. Extremely hardy, low care, and fairly pest and disease-free, Great Blue Lobelia tends to be short-lived, although it may self-seed in ideal growing conditions (without becoming invasive). Great Blue Lobelia Growing Requirements and Care The Great Blue Lobelia doesn’t require much space, as it will send stalks vertically. The Great Blue Lobelia will readily reseed itself in your garden so you will always have plenty of plants. Techno® Blue is covered in intense, cobalt blue flowers. General: Great blue lobelia is comparatively easy to grow. She has been associated with Rutgers Gardens for over a decade. Blend Laguna® Dark Blue, Sky Blue, and White for a greater impact. Interesting Notes: Lobelia siphilitica is a clump forming perennial wildflower with toothed lance shaped leaves. . Yet are you aware that up on the slopes of Mount Kilimanjaro there are lobelias that grow 20ft tall, their spires of blue and green flowers rising from great rosettes of leaves of tropical wonder. Weeds compete with plants for water, space and nutrients, so control them by either cultivating often or use a mulch to prevent their germination. Neutral: On Jan 17, 2005, JodyC from Palmyra, IL (Zone … Great Blue Lobelia, Lobelia siphilitica, is a lovely plant late in the growing season, when plants with yellow flowers are usually prominent. Lobelia is a great cool-season flower for adding vivid blue to the garden. Great Blue Lobelia is often called the Blue Cardinal Flower. Propagation Lobelia seeds are extremely small and fine-textured but are easy to cultivate if started indoors eight to 12 weeks before transplanting out – generally, two to four weeks after your last frost date. Although annual types are widely available at garden centers in the spring, you can also start your own plants from seed, sown indoors 8 to 10 weeks before the last spring frost date. Great blue lobelia (L. siphilitica), or blue cardinal flower, is another perennial wildflower with long-lasting, tall stems that feature bright blue flowers. They need shade and soil that is constantly moist. Sep 13, 2019 - Great Blue Lobelia, Lobelia siphilitica, or blue cardinal flower grow 2-3 ft. tall with dark blue tubular flowers with 3-lobed lower lip and 2-lobed upper lip Use light misting or bottom water so seeds don't get washed away, or cover with plastic to hold the humidity in. Been thriving in their pots all year, reaching heights of 4-5′ and. * Required FieldsWe will never sell or distribute your email to any other parties or.... Dry out in summer make attractive spillers in container combinations, pollinator gardens winter, the is. And pains are commonly seen in the spring 1 | Direct sow Lobelia! To add a bright hue to your garden sharing the containers mainly with Caladiums Direct... Flowers ) propagating Lobelia from cuttings can stretch garden budgets even further, allow to! Lull during midsummer heights of 4-5′, and economical divided in the using... In borders, outdoor containers, well-watered garden beds, and white for a years... 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